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1994 IUCN red list of threatened animals (1994)

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Abhandlungen der Naturhistorischen Gesellschaft zu Nürnberg - Naturhistorische Gesellschaft Nürnberg. (Conrad Geiger, 1913)

Abhandlungen der Schweizerischen paläontologischen Gesellschaft = Mémoires de la Société paléontologique suisse - Schweizerische Naturforschende Gesellschaft. (H. Georg, 1891)

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Additional Middle Eocene (Bridgerian) mammals from Tabernacle Butte, Sublette County, Wyoming - West, Robert M. (American Museum of Natural History, 1970)

Additional Schizotherium material from China, and a review of Schizotherium dentitions (Perissodactyla, Chalicotheriidae) - Coombs, Margery Chalifoux (American Museum of Natural History, 1978)

An address on the natural history and pathological osteology of the horse - Cressy, N. (Noah), (Case, Lockwood & Brainard, printers, 1870)

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African Ixodoidea. l. Ticks of the Sudan - Hoogstraal, Harry, 1917 -1986 (1956)

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Age and correlation of fossiliferous late Paleocene-early Eocene strata of the Erlian Basin, Inner Mongolia, China - Ye, Jie. (American Museum of Natural History, 2005)

The age of mammals in Europe, Asia and North America - Osborn, Henry Fairfield, 1857 -1935 (The Macmillan company, 1910)

The age of mammals in Europe, Asia and North America - Osborn, Henry Fairfield, 1857 -1935 (The Macmillan Company, 1910)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1858)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1880)

Die altenglischen säugetiernamen : zusammengestellt und erläutert - Jordan, Richard, 1877 -1925 (C. Winter's universitätsbuchhandlung, 1903)

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The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1890)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1891)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1892)

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.], 1896)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1899)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1900)

The American geologist - Winchell, N. H. 1839 -1914 (Geological Pub. Co. [etc.], 1905)

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The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1904)

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The American journal of science (J.D. & E.S. Dana, 1882)

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

The American journal of science (J.D. & E.S. Dana, 1887)

The American journal of science (J.D. & E.S. Dana, 1890)

The American journal of science (J.D. & E.S. Dana, 1892)

The American journal of science (J.D. & E.S. Dana, 1893)

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

The American journal of science (J.D. & E.S. Dana, 1903)

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

The American journal of science (J.D. & E.S. Dana, 1909)

The American journal of science (J.D. & E.S. Dana, 1915)

The American journal of science (J.D. & E.S. Dana, 1916)

The American journal of science (J.D. & E.S. Dana, 1921)

The American journal of science and arts - Silliman, Benjamin, 1779 -1864 (S. Converse, 1863)

The American Museum journal - American Museum of Natural History (American Museum of Natural History, 1903)

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The American natural history; a foundation of useful knowledge of the higher animals of North America - Hornaday, William T. (William Temple), 1854 -1937 (C. Scribner's Sons, 1914)