1986 IUCN red list of threatened animals - IUCN Conservation Monitoring Centre. (International Union for Conservation of Nature and Natural Resources, 1986)

1988 IUCN red list of threatened animals (1988)

1988 IUCN red list of threatened animals (1988)

1990 IUCN red list of threatened animals (1990)

1994 IUCN red list of threatened animals (1994)

1994 IUCN red list of threatened animals (1994)

Abhandlungen der Bayerischen Akademie der Wissenschaften, Mathematisch- physikalische Klasse - Bayerische Akademie der Wissenschaften. Mathematisch-Physikalische Klasse. (Verlag der Bayerischen Akademie der Wissenschaften in Kommission es G. Franzschen Verlags (J. Roth), 1919)

Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt - K.K. Geologische Reichsanstalt (Austria) (Kaiserlich-Königlichen Geologische Reichsanstalt, 1874)

Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt - K.K. Geologische Reichsanstalt (Austria) (Kaiserlich-Königlichen Geologische Reichsanstalt, 1874)

Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt - K.K. Geologische Reichsanstalt (Austria) (Kaiserlich-Königlichen Geologische Reichsanstalt, 1874)

Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft - Senckenbergische Naturforschende Gesellschaft. (Waldemar Kramer [etc.], 1920)

Abstammungslehre, Systematik, Paläontologie, Biogeographie - Wettstein, Richard, Ritter von Westersheim, 1863 -1931 (B. G. Teubner, 1914)

Abstammungslehre, Systematik, Paläontologie, Biogeographie - Wettstein, Richard, Ritter von Westersheim, 1863 -1931 (B. G. Teubner, 1914)

Advanced text-book of zoology for the use of schools - Nicholson, Henry Alleyne, 1844 -1899 (W. Blackwood and Sons, 1873)

Advanced text-book of zoology for the use of schools - Nicholson, Henry Alleyne, 1844 -1899 (W. Blackwood and Sons, 1873)

Advanced text-book of zoology for the use of schools - Nicholson, Henry Alleyne, 1844 -1899 (W. Blackwood and Sons, 1873)

Advanced text-book of zoology for the use of schools - Nicholson, Henry Alleyne, 1844 -1899 (W. Blackwood and Sons, 1873)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1888)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1894)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1895)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1902)

The American journal of science (J.D. & E.S. Dana, 1885)

The American journal of science (J.D. & E.S. Dana, 1894)

The American journal of science (J.D. & E.S. Dana, 1895)

The American journal of science (J.D. & E.S. Dana, 1896)

The American journal of science (J.D. & E.S. Dana, 1896)

The American journal of science (J.D. & E.S. Dana, 1897)

The American journal of science (J.D. & E.S. Dana, 1897)

The American journal of science (J.D. & E.S. Dana, 1899)

The American journal of science (J.D. & E.S. Dana, 1900)

The American journal of science (J.D. & E.S. Dana, 1900)

The American journal of science (J.D. & E.S. Dana, 1900)

The American journal of science (J.D. & E.S. Dana, 1900)

The American journal of science (J.D. & E.S. Dana, 1901)

The American journal of science (J.D. & E.S. Dana, 1901)

The American journal of science (J.D. & E.S. Dana, 1911)

The American journal of science (J.D. & E.S. Dana, 1912)

The American journal of science (J.D. & E.S. Dana, 1912)

The American journal of science (J.D. & E.S. Dana, 1912)

The American journal of science (J.D. & E.S. Dana, 1912)

The American journal of science (J.D. & E.S. Dana, 1913)

The American journal of science (J.D. & E.S. Dana, 1914)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1867)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1872)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1872)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1872)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1872)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1873)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1873)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1873)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1875)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1789)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1880)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1880)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1881)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1882)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1882)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1882)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1882)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1882)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1884)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1884)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1885)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1885)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1886)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1886)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1886)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1886)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1888)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1890)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1894)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1894)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1894)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1902)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1902)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1902)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1920)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1920)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1920)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1922)

Amphipacifica : journal of systematic biology (Amphipacifica Research Publications, 1995)

Amphipacifica : journal of systematic biology (Amphipacifica Research Publications, 1995)

Amphipacifica : journal of systematic biology (Amphipacifica Research Publications, 1995)

Amphipacifica : journal of systematic biology (Amphipacifica Research Publications, 1995)

Anatomischer Anzeiger - Anatomische Gesellschaft. (G. Fischer, 1898)

Anatomischer Anzeiger - Anatomische Gesellschaft. (G. Fischer, 1921)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

The anatomy, histology, and embryology of Limulus polyphemus - Packard, A. S. (Alpheus Spring), 1839 -1905 (The Society, 1880)

Anatomy of the King Crab, Limulus Polyphemus, Latr - Owen, Richard, 1804 -1892 (Taylor & Francis, 1873)

Anatomy of the King Crab, Limulus Polyphemus, Latr - Owen, Richard, 1804 -1892 (Taylor & Francis, 1873)

Anatomy of the King Crab, Limulus Polyphemus, Latr - Owen, Richard, 1804 -1892 (Taylor & Francis, 1873)

Anatomy of the King Crab, Limulus Polyphemus, Latr - Owen, Richard, 1804 -1892 (Taylor & Francis, 1873)

Anatomy of the King Crab, Limulus Polyphemus, Latr - Owen, Richard, 1804 -1892 (Taylor & Francis, 1873)

Anatomy of the king crab (Limulus polyphemus, Latr.) / by Richard Owen - Owen, Richard, 1804 -1892 (Printed by Taylor and Francis, 1873)

Anatomy of the king crab (Limulus polyphemus, Latr.) / by Richard Owen - Owen, Richard, 1804 -1892 (Printed by Taylor and Francis, 1873)

Anatomy of the king crab (Limulus polyphemus, Latr.) / by Richard Owen - Owen, Richard, 1804 -1892 (Printed by Taylor and Francis, 1873)

Anatomy of the king crab (Limulus polyphemus, Latr.) / by Richard Owen - Owen, Richard, 1804 -1892 (Printed by Taylor and Francis, 1873)

Anatomy of the king crab (Limulus polyphemus, Latr.) / by Richard Owen - Owen, Richard, 1804 -1892 (Printed by Taylor and Francis, 1873)

The ancient life-history of the earth - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth. A comprehensive outline of the principles and leading facts of palaeontological science - Nicholson, Henry Alleyne, 1844 -1899 (Wheeler Pub. Co, 1890)

The ancient life-history of the earth. A comprehensive outline of the principles and leading facts of palaeontological science - Nicholson, Henry Alleyne, 1844 -1899 (Wheeler Pub. Co, 1890)

The ancient life-history of the earth. A comprehensive outline of the principles and leading facts of palaeontological science - Nicholson, Henry Alleyne, 1844 -1899 (Wheeler Pub. Co, 1890)

The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science - Nicholson, Henry Alleyne, 1844 -1899 (A.L. Fowle, 1876)

The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science - Nicholson, Henry Alleyne, 1844 -1899 (A.L. Fowle, 1876)

The ancient life-history of the earth : a comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (Blackwood, 1877)

The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth. A comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (Werner, 1876)

The ancient life-history of the earth. A comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (Werner, 1876)

The ancient life-history of the earth. A comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (Werner, 1876)

The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and company, 1897)

The ancient life-history of the earth : a comprehensive outline of the principles and leading facts of palæontological science - Nicholson, Henry Alleyne, 1844 -1899 (Blackwood, 1877)

Animal keepers' forum - American Association of Zoo Keepers (American Association of Zoo Keepers, 2010)

Animal keepers' forum - American Association of Zoo Keepers (American Association of Zoo Keepers, 2010)

Annalen des K.K. Naturhistorischen Hofmuseums - K.K. Naturhistorisches Hofmuseum (Vienna, Austria) (Alfred Hölder, 1918)

Annales des sciences naturelles Zoologie - Audouin, Jean Victor, 1797 -1841 (Crochard, 1860)

Annales des sciences naturelles Zoologie - Audouin, Jean Victor, 1797 -1841 (Crochard, 1873)

Annales des sciences naturelles Zoologie - Audouin, Jean Victor, 1797 -1841 (Crochard, 1873)

Annales des sciences naturelles Zoologie - Audouin, Jean Victor, 1797 -1841 (Crochard, 1873)

Annales des sciences naturelles Zoologie - Audouin, Jean Victor, 1797 -1841 (Crochard, 1881)

Annales des sciences naturelles Zoologie - Audouin, Jean Victor, 1797 -1841 (Crochard, 1884)

Annali del Museo civico di storia naturale di Genova - Museo civico di storia naturale di Genova (Italy) (Tip. del R. Istituto Sordo-Muti, 1896)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1846)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1867)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1872)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1880)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1880)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1882)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1883)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1884)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1885)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1886)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1886)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1887)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1887)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1887)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1890)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1890)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1890)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1890)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1890)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1890)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1892)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1893)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1893)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1894)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1895)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1895)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1898)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1898)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1898)

The Annals and magazine of natural history; zoology, botany, and geology (Taylor and Francis, Ltd, 1898)

The Annals of Scottish natural history (David Douglas, 1892)

The Annals of Scottish natural history (David Douglas, 1892)

The Annals of Scottish natural history (David Douglas, 1892)

The Annals of Scottish natural history (David Douglas, 1892)

The Annals of Scottish natural history (David Douglas, 1892)

The Annals of Scottish natural history (David Douglas, 1892)

Annals of the Carnegie Museum - Carnegie Museum (Published by authority of the Board of Trustees of the Carnegie Institute, 1938)

Annals of the Carnegie Museum - Carnegie Museum (Published by authority of the Board of Trustees of the Carnegie Institute, 1970)

Annals of the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden Press, 2000)

Annals of the New York Academy of Sciences - New York Academy of Sciences. (New York Academy of Sciences, 1889)

Annals of the New York Academy of Sciences - New York Academy of Sciences. (New York Academy of Sciences, 1890)

Annals of the New York Academy of Sciences - New York Academy of Sciences. (New York Academy of Sciences, 1889)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880 - Boston Society of Natural History. (The Society, 1880)

Annual record of science and industry - Baird, Spencer Fullerton, 1823 -1887 (Harper & Brothers, 1872)

Annual record of science and industry - Baird, Spencer Fullerton, 1823 -1887 (Harper & Brothers, 1873)

Annual record of science and industry - Baird, Spencer Fullerton, 1823 -1887 (Harper & Brothers, 1873)

Annual report - New York State Museum. (University of the State of New York, 1907)