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)

1990 IUCN red list of threatened animals (1990)

1994 IUCN red list of threatened animals (1994)

Abhandlungen der Königlich Preussischen Geologischen Landesanstalt - Königlich-Preussische Geologische Landesanstalt. (1905)

Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin - Deutsche Akademie der Wissenschaften zu Berlin. (Realschul-Buchhandlung, 1834)

Abhandlungen der Königlichen Gesellschaft der Wissenschaften zu Göttingen - Akademie der Wissenschaften in Göttingen (In der Dieterichschen Buchhandlung, 1845)

Abhandlungen der Naturforschenden Gesellschaft zu Halle - Naturforschende Gesellschaft zu Halle. (Naturforschende Gesellschaft zu Halle, 1856)

Abhandlungen der Schweizerischen paläontologischen Gesellschaft = Mémoires de la Société paléontologique suisse - Schweizerische Naturforschende Gesellschaft. (H. Georg, 1892)

Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft - Senckenbergische Naturforschende Gesellschaft. (Waldemar Kramer [etc.], 1886)

Abhandlungen von Schnecken Muscheln und Seegewachsen, welche um Ambroin na und den umliegenden Inseln gefunden werden : Als ein Anhang zu Georg Eberhard Rumphs Amboinischen Raritatenkammer - Rumpf, Georg Eberhard, 1627 -1702 (Krauss, 1705)

Abriss der zoologie für studirende : ärzte und lehrer - Brass, Arnold, 1854 -1915 (W. Engelmann, 1882)

Abstracts of the papers printed in the Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1830)

Abstracts of the papers printed in the Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1837)

An account of the Crustacea of Norway, with short descriptions and figures of all the species - Sars, G. O. (Georg Ossian), 1837 -1927 (A. Cammermeyer, 1895)

An account of the Crustacea of Norway, with short descriptions and figures of all the species - Sars, G. O. (Georg Ossian), 1837 -1927 (A. Cammermeyer, 1899)

An account of the Crustacea of Norway, with short descriptions and figures of all the species - Sars, G. O. (Georg Ossian), 1837 -1927 (A. Cammermeyer, 1900)

Acta Helvetica Physico-Mathematico-Anatomico-Botanico-Medica - Societas Physico-Medica Basiliensis. (1760)

Acta Helvetica Physico-Mathematico-Anatomico-Botanico-Medica - Societas Physico-Medica Basiliensis. (1762)

Acta Societatis pro Fauna et Flora Fennica - Societas pro Fauna et Flora Fennica (Societas, 1898)

Acta Societatis pro Fauna et Flora Fennica - Societas pro Fauna et Flora Fennica (Societas, 1909)

Acta Societatis pro Fauna et Flora Fennica - Societas pro Fauna et Flora Fennica (Societas, 1910)

Actes de la Société linnéenne de Bordeaux - Société Linnéenne de Bordeaux. (The Society, 1871)

Actes de la Société linnéenne de Bordeaux - Société Linnéenne de Bordeaux. (The Society, 1894)

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

Aide-mémoire de Zoologie - Girard, Henri, 1879 -1949 (J.-B. Bailliere, 1895)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1869)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1872)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1887)

Allgemeine Anatomie und Physiologie des Nervensystems - Bethe, Albrecht, 1872 -1954 (G. Thieme, 1903)

Allgemeine Encyklopädie der gesammten Forst- und Jagdwissenschaften. Unter Mitwirkung der bedeutendsten Fachautoritäten - Dombrowski, Raoul von, 1833 -1896 (M. Perles, 1886)

Allgemeine Fischerei-Zeitung (Landesfischereiverband Bayern [etc.], 1885)

Allgemeine Fischerei-Zeitung (Landesfischereiverband Bayern [etc.], 1895)

Allgemeine Fischerei-Zeitung (Landesfischereiverband Bayern [etc.], 1897)

Allgemeine Fischerei-Zeitung (Landesfischereiverband Bayern [etc.], 1907)

Allgemeine naturgeschichte, als Philosophische und Humanitätswissenschaft für Naturforscher, Philosophen und das Hoher gebildete Publikum - Perty, Maximilian, 1804 -1884 (C. Fischer, 1837)

Allgemeine naturgeschichte, als Philosophische und Humanitätswissenschaft für Naturforscher, Philosophen und das Hoher gebildete Publikum - Perty, Maximilian, 1804 -1884 (C. Fischer, 1838)

Allgemeine naturgeschichte, als Philosophische und Humanitätswissenschaft für Naturforscher, Philosophen und das Hoher gebildete Publikum - Perty, Maximilian, 1804 -1884 (C. Fischer, 1841)

Allgemeine Naturgeschichte für alle Stände - Oken, Lorenz, 1779 -1851 (Hoffman'sche Verlags-Buchhandlung, 1835)

Allgemeine Naturgeschichte für alle Stände - Oken, Lorenz, 1779 -1851 (Hoffman'sche Verlags-Buchhandlung, 1841)

Allgemeine Naturgeschichte für alle Stände - Oken, Lorenz, 1779 -1851 (Hoffman'sche Verlags-Buchhandlung, 1836)

Allgemeine Naturgeschichte für alle Stände - Oken, Lorenz, 1779 -1851 (Hoffman'sche Verlags-Buchhandlung, 1842)

Allgemeine Zeitschrift für Entomologie Organ der "Allgemeinen Entomologischen Gesellschaft" ; Internationales Organ für die Interessen der allgemeinen und angewandten Entomologie wie der Insekten-Biologie - Allgemeine Entomologische Gesellschaft. (Druck und Verlag von J. Neumann, 1902)

Allgemeine Zoologie und Abstammungslehre - Plate, Ludwig, 1862 -1937 (Fischer, 1922)

Allgemeines Polyglotten-Lexicon der Naturgeschichte mit erklaerenden Anmerkungen - Nemnich, Philipp Andreas, 1764 -1822 (Nemnich, 1793)

Les "Alpheidae," morphologie externe et interne, formes larvaires, bionomie - Coutière, Henri, 1869 -1952 (Masson, 1899)

American agriculturist (Orange Judd Co., Publishers [etc.], 1877)

American agriculturist, for the farm, garden and household (Orange Judd Co, 1877)

The American angler's guide; or, Complete fisher's manual, for the United States : containing the opinions and practices of experienced anglers of both hemispheres ; with the various modes adopted in ocean, river, lake and pond fishing - Brown, John J. (D. Appleton and Ccompany, 1857)

The American angler's guide; or, Complete fisher's manual, for the United States: Containing the opinions and practices of experienced anglers of both hemispheres; with the various modes adopted in ocean, river, lake, and pond fishing - Brown, John J. (D. Appleton and company, 1876)

American angler's guide : or, complete fisher's manual, for the United States: containing the opinions and practices of experienced anglers of both hemispheres ; with the addition of a second part - Brown, John J. (H. Long & Brother, 1849)

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

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1912)

American journal of conchology - Tryon, George W., (George Washington), 1838 -1888 (G.W. Tryon, jr, 1867)

American journal of physiology - American Physiological Society (1887- ) (American Physiological Society [etc.], 1901)

American journal of physiology - American Physiological Society (1887- ) (American Physiological Society [etc.], 1907)

The American journal of science (J.D. & E.S. Dana, 1886)

The American journal of science (J.D. & E.S. Dana, 1907)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1834)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1839)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1846)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1847)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1849)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1852)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1854)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1855)

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

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1874)

The American lobster; a study of its habits and development - Herrick, Francis Hobart, 1858 -1940 (Govt. Print. Off, 1895)

American men of science; a biographical directory - Cattell, James McKeen, 1860 -1944 (Science Press, 1906)

American men of science; a biographical directory - Cattell, James McKeen, 1860 -1944 (The Science Press, 1921)

The American monthly microscopical journal (Romyn Hitchcock, 1897)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1870)

The American naturalist - American Society of Naturalists. (Published for the American Society of Naturalists by the University of Chicago Press [etc.], 1872)

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.], 1874)

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.], 1878)

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.], 1883)

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.], 1887)

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