Compend on bacteriology, including pathogenic protozoa - Pitfield, Robert L. (P. Blakiston's, 1922)

A compilation of culture media for the cultivation of microorganisms - Levine, Max, 1889 -1967 (The Williams & Wilkins Company, 1930)

Comptes rendus des séances de la Société de biologie - Société de biologie (Paris, France) (Masson et Cie, 1918)

Comptes rendus hebdomadaires des séances et mémoires de la Société de biologie - Société de biologie (Paris, France) (G. Masson, 1911)

Conférences de zoologie faites à la Sorbonne. Protozoaires - Robert, A., zoologist. (Association amicale des ves et anciens ves de la Facultes sciences de Paris, 1914)

Conspectus Cyclostomaceorum emendatus et auctus. Pneumonopomorum monographiae prodromus - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (Th Fischeri, 1852)

Contributions à la faune malacologique francaise - Locard, Arnould, 1841 -1904 (Imprimerie Pitrat ainé, 1889)

Contributions from the Botanical Laboratory - University of Pennsylvania. Botanical Laboratory. (University of Pennsylvania Press, 1892)

Contributions from the laboratory - Rothamsted Experimental Station. (1909)

Contributions to embryology - Carnegie Institution of Washington (Carnegie Institution of Washington, 1918)

Contributions to the study of the behavior of lower organisms - Jennings, H. S. (Herbert Spencer), 1868 -1947 (Carnegie Institution of Washington, 1904)