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)

1994 IUCN red list of threatened animals (1994)

Abbildungen und Beschreibungen der Fische Syriens : nebst einer neuen Classification und Characteristik sämmtliches Gattungen der Cyprinen - Heckel, Johann Jakob, 1790 -1857 (E. Schweizerbart'sche, 1843)

Abhandlungen der Churfurstlich-Baierischen Akademie der Wissenschaften - Churfurstlich-Baierische Akademie der Wissenschaften. (1769)

Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin - Deutsche Akademie der Wissenschaften zu Berlin. (Realschul-Buchhandlung, 1843)

Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin - Deutsche Akademie der Wissenschaften zu Berlin. (Realschul-Buchhandlung, 1822)

Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin - Deutsche Akademie der Wissenschaften zu Berlin. (Realschul-Buchhandlung, 1851)

Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft - Senckenbergische Naturforschende Gesellschaft. (Waldemar Kramer [etc.], 1897)

Abstract of the proceedings of the Linnaean Society of New York - Linnaean Society of New York (The Society, 1903)

An account of the fishes of the states of Central America : based on collections made by Capt. J. M. Dow, F. Godman and O. Salvin - Günther, Albert C. L. G. (Albert Carl Ludwig Gotthilf), 1830 -1914 (1869)

The action of various pharmacological and other chemical agents on the chromatophores of the brook trout Salvelinus fontinalis Mitchill - Lowe, John Nicholas. (The Waverly press, 1917)

Activities report - Smithsonian Institution (Museum of Natural History, Smithsonian Institution, 1974)

Activities report - Smithsonian Institution (Museum of Natural History, Smithsonian Institution, 1965)

Addresses and papers - Gage, Simon Henry, 1851 -1944 (1898)

Agricultural index - H.W. Wilson Company. (H. W. Wilson Co, 1919)

Aguas continentales y diversidad biológica de México - Arriaga Cabrera, Laura (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2000)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1882)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1905)

Album der Natuur - Vries, Hugo de, 1848 -1935 (1906)

Allgemeine biologie - Kammerer, Paul, 1880 -1926 (Deutsche Verlagsanstalt, 1915)

Allgemeine Biologie - Johannsen, W. (Wilhelm), 1857 -1927 (Teubner, 1915)

Allgemeine Biologie - Hertwig, Oscar, 1849 -1922 (G. Fischer, 1923)

Allgemeine Fischerei-Zeitung (Landesfischereiverband Bayern [etc.], 1905)

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

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, 1901)

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

The American Arbacia and other sea urchins - Harvey, Ethel Browne, 1885 - (Princeton University Press, 1956)

American fishes; a popular treatise upon the game and food fishes of North America, with especial reference to habits and methods of capture - Goode, G. Brown (George Brown), 1851 -1896 (L. C. Page, 1903)

American food and game fishes : a popular account of all the species found in America north of the equator, with keys for ready identification, life histories and methods of capture - Jordan, David Starr, 1851 -1931 (Doubleday, Page, 1904)

American food and game fishes : a popular account of all the species found in America north of the equator, with keys for ready identification, life histories, and methods of capture - Jordan, David Starr, 1851 -1931 (Briggs, 1969)

American food and game fishes : a popular account of all the species found in America north of the Equator, with keys for ready identification, life histories and methods of capture - Jordan, David Starr, 1851 -1931 (Doubleday, Page & Co, 1902)

American food and game fishes. A popular account of all the species found in America north of the equator, with keys for ready identification, life histories and methods of capture - Jordan, David Starr, 1851 -1931 (Doubleday, Page & Co, 1908)

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

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1906)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1908)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1909)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1910)

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

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1913)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1915)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1916)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1917)

The American journal of anatomy - Wistar Institute of Anatomy; Biology. ([s.n.], 1918)