The Cambridge natural history - Harmer, S. F. (Sidney Frederic), 1862 -1950 (Macmillan and co., limited, 1909)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1978)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1991)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1998)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 2007)

Capital natural de México - Sarukhan, Jose (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2008)

Capital natural de México - Sarukhan, Jose (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2009)

Carnegie Institution of Washington publication - Carnegie Institution of Washington (Carnegie Institution of Washington, 1907)

Carnegie Institution of Washington publication - Carnegie Institution of Washington (Carnegie Institution of Washington, 1911)

Carnegie Institution of Washington publication - Carnegie Institution of Washington (Carnegie Institution of Washington, 1930)

Cassell's natural history - Duncan, P. Martin (Peter Martin), 1821 -1891 (Cassell, Petter & Galpin, 1876)

The cat : an introduction to the study of backboned animals, especially mammals - Mivart, St. George Jackson, 1827 -1900 (Scribner's, 1881)

Catálogo de la colección de reptiles y batracios del Museo Nacional - Herrera, Alfonso L., 1868 -1942 (Imprenta del Museo Nacional, 1895)

Catalogue de la bibliothèque - Bohnensieg, G. C. W. (Georg Carl Wilhelm), 1828 - (Héritiers Loosjes, 1885)

Catalogue des coléoptères de la chaîne des Vosges et des régions limitrophes - Bourgeois, Jules, 1847 -1911 (Decker, 1897)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1867)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1869)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1870)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1871)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1877)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1879)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1896)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1916)

Catalogue of scientific papers, 1800-1863 [to 1884-1900] - Royal Society (Great Britain) (Eyre & Spottiswoode, 1908)

Catalogue of the Hemiptera (Heteroptera) with biological and anatomical references, lists of foodplants and parasites, etc. prefaced by a discussion on nomenclature, and an analytical table of families - Kirkaldy, George Willis, 1873 -1910 (F. L. Dames, 1909)

Catalogue of the lizards in the British museum (Natural history) - Boulenger, George Albert 1858 -1937 (Printed by order of the Trustees, 1885)

Catalogue of the lizards in the British museum (Natural history) - Boulenger, George Albert 1858 -1937 (Printed by order of the Trustees, 1887)

Catalogue of the Specimens of lizards in the collection of the British museum - Gray, John Edward 1800 -1875 (Printed by order of the Trustees, 1845)

Cenni sul Museo civico di Milano - Museo civico di storia naturale di Milano. (L.di Giacomo Priola, 1857)

Cenni sul Museo civico di Milano - Museo civico di storia naturale di Milano. (L. di Giacomo Priola, 1857)

The Century dictionary : an encyclopedic lexicon of the English language: prepared under the superintendence of William Dwight Whitney - Whitney, William Dwight, 1827 -1894 (Century Co, 1889)

The Ceratopsia - Hatcher, J. B. (John Bell), 1861 -1904 (Govt. Print. Off, 1907)

Chapters on the natural history of the United States - Shufeldt, Robert Wilson 1850 -1934 (Studer Bros, 1897)

Chapters on the natural history of the United States - Shufeldt, Robert Wilson 1850 -1934 (Studer Brothers, 1900)

A check list of North American amphibians and reptiles - Stejneger, Leonhard, 1851 -1943 (Harvard University Press, 1917)

A check list of North American amphibians and reptiles - Stejneger, Leonhard, 1851 -1943 (Harvard University Press ; [etc., etc.], 1923)

A check list of North American amphibians and reptiles - Stejneger, Leonhard, 1851 -1943 (Harvard University Press, 1933)

Check-list of North American Batrachia and Reptilia with a systematic list of the higher groups and an essay on geographical distribution, based on the specimens contained in the U. S. National Museum - Cope, E. D. (Edward Drinker), 1840 -1897 (G.P.O, 1875)

Check-list of the amphibians and reptiles of Canada and Alaska - Royal Ontario Museum. (Royal Ontario Museum, 1955)

Checklist of CITES Species (1998)