Proceedings of the Essex Institute - Essex Institute. (Essex Institute Press, 1866)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1918)

Proceedings of the Linnean Society of London - Linnean Society of London. (Published for the Linnean Society of London by Academic Press [etc.], 1838)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1883)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1909)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1929)

Proceedings of the Natural history society of Dublin for the session ... - Natural History Society of Dublin. (Printed for the Society, 1856)

Proceedings of the Philosophical Society of Glasgow - Philosophical Society of Glasgow.

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1843)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1847)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1853)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1854)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1909)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1866)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1894)

The Proceedings of the Royal Society of Queensland - Royal Society of Queensland. (Royal Society of Queensland], 1905)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1906)

Proceedings of the Royal Society of Victoria. New series - Royal Society of Victoria (Melbourne, Vic.) (Stillwell and Co, 1934)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1904)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1911)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1925)

Proceedings of the Washington Academy of Sciences - Washington Academy of Sciences (Washington, D.C.) (Washington Academy of Sciences, 1900)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1907)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1913)

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.], 1901)

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

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

Die Protozoen als Krankheitserreger : Nachtraege - Pfeiffer, L. (Ludwig), 1842 -1921 (G. Fischer, 1895)

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

A quantitative and statistical study of the plankton of the San Joaquin River and its tributaries in and near Stockton, California, in 1913 - Allen, Winfred Emory, 1873 -1947 (University of California Press, 1920)

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

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1858)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1861)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1869)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1870)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1871)

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

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

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1896)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1906)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1948)

Raboty Volzhskoĭ biologicheskoĭ stant͡sii = Arbeiten der Biologischen Wolga-Station - Volzhskai͡a biologicheskai͡a stant͡sii͡a (Stant͡sii͡a, 1906)

Raboty Volzhskoĭ biologicheskoĭ stant͡sii = Arbeiten der Biologischen Wolga-Station - Volzhskai͡a biologicheskai͡a stant͡sii͡a (Stant͡sii͡a, 1914)

Raboty Volzhskoĭ biologicheskoĭ stant͡sii = Arbeiten der Biologischen Wolga-Station - Volzhskai͡a biologicheskai͡a stant͡sii͡a (Stant͡sii͡a, 1915)

Rambles and reveries of a naturalist - Spiers, William. (Kelly, 1890)

The rambles of a naturalist on the coasts of France, Spain, and Sicily - Otté, E. C. (Longman, Brown, Green, Longmans, & Roberts, 1857)

Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature - Dalyell, John Graham, 1775 -1851 (J. Van Voorst, 1848)

The Record of zoological literature (J. van Voorst, 1866)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1907)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1908)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1909)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1910)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1912)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1913)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1915)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1918)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1919)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1921)

Report - Illinois. State Board of Fish Commissioners. (1888)

Report (and Abstracts of Proceedings and Papers) of the Brighton and Sussex Natural History and Philosophical Society - Brighton; Sussex Natural History; Philosophical Society. (1875)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1835)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1837)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1843)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1847)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1850)