Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1964)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1968)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1887)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1892)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1909)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1920)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1922)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1911)

Prodromus faunae mediterraneae, sive Descriptio animalium maris Mediterranei incolarum, quam comparata silva rerum quatenus innotuit, adiectis locis et nominibus vulgaribus eorumque auctoribus - Carus, Julius Victor, 1823 -1903 (E. Schweizerbart, 1885)

Protozoa - Bhatia, B. L. (Bihari Lal), 1884 -1941 (Taylor and Francis, 1936)

Protozoa ... - Bhatia, B. L. (Bihari Lal), 1884 -1941 (Taylor and Francis, 1936)

Protozoa ... - Bhatia, B. L. (Bihari Lal), 1884 -1941 (Taylor and Francis, 1938)

Protozoa - Schwager, Conrad. (C.F. Winter, 1887)

Protozoa - Schwager, Conrad. (C.F. Winter, 1880)

Publication. Field Museum of Natural History. Geological series - Field Museum of Natural History. (The Museum, 1931)

Publications - Ontario Fisheries Research Laboratory. (University of Toronto Press, 1922)

Publications in zoology = Publications en zoologie - National Museum of Natural Sciences (Canada) (National Museums of Canada, National Museum of Natural Sciences, 1970)

Publications in zoology = Publications en zoologie - National Museum of Natural Sciences (Canada) (National Museums of Canada, National Museum of Natural Sciences, 1973)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1968)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1975)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1867)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1868)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1878)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1879)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1880)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1882)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1884)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1885)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1886)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1887)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1889)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1890)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1891)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1892)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1894)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1899)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1900)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1904)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1914)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1916)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1919)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1923)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1853)