Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1965)

Palaeontology - Palaeontological Association (Palaeontological Association, 1966)

Palaeontology - Palaeontological Association (Palaeontological Association, 1967)

Palaeontology - Palaeontological Association (Palaeontological Association, 1968)

Palaeontology - Palaeontological Association (Palaeontological Association, 1969)

Palaeontology - Palaeontological Association (Palaeontological Association, 1973)

Palaeontology - Palaeontological Association (Palaeontological Association, 1976)

Palaeontology - Palaeontological Association (Palaeontological Association, 1977)

Palaeontology - Palaeontological Association (Palaeontological Association, 1979)

Palaeontology - Palaeontological Association (Palaeontological Association, 1981)

Palaeontology - Palaeontological Association (Palaeontological Association, 1982)

Palaeontology - Palaeontological Association (Palaeontological Association, 1990)

Palaeontology - Palaeontological Association (Palaeontological Association, 1994)

Palaeontology - Palaeontological Association (Palaeontological Association, 1996)

Paleontological research - Nihon Koseibutsu Gakkai (Palaeontological Society of Japan, 1997)

Paleontological research - Nihon Koseibutsu Gakkai (Palaeontological Society of Japan, 2000)

Paleontological research - Nihon Koseibutsu Gakkai (Palaeontological Society of Japan, 2001)

Paleontological research - Nihon Koseibutsu Gakkai (Palaeontological Society of Japan, 2002)

Papers from the Tortugas Laboratory of the Carnegie Institution of Washington - Carnegie Institution of Washington. Department of Marine Biology. (Carnegie Institution of Washington, 1917)

Papers from the Tortugas Laboratory of the Carnegie Institution of Washington - Carnegie Institution of Washington. Department of Marine Biology. (Carnegie Institution of Washington, 1918)

The parasites of man, and the diseases which proceed from them. A text-book for students and practitioners - Leuckart, Rudolf, 1823 -1898 (Y.J. Pentland, 1886)

The parasites of man, and the diseases which proceed from them; a textbook for students and practitioners - Leuckart, Rudolf, 1823 -1898 (Pentland, 1886)

The parasites of man, and the diseases which proceed from them : a text-book for students and practitioners - Leuckart, Rudolf, 1823 -1898 (Young J. Pentland, 1886)

Pathogenic micro-organisms. A text-book of microbiology for physicians and students of medicine. (Based upon Williams' Bacteriology) - MacNeal, Ward J., 1881 -1946 (P. Blakiston's Son & Co, 1920)

Pathogenic micro-organisms : including bacteria and Protozoa; a practical manual for students, physicians and health officers - Park, William Hallock, 1863 -1939 (Kimpton, 1908)

Pathogenic micro-organisms; a text-book of microbiology for physicians and students of medicine - MacNeal, Ward J., 1881 -1946 (P. Blakiston's son & co, 1914)

Peninsula Field Naturalists' Club Newsletter - Peninsula Field Naturalists' Club (Peninsula Field Naturalists' Club, 2020)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain. (J. & A. Churchill, 1877)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain. (J. & A. Churchill, 1883)

Philosophical pamphlets (1885)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1869)

The philosophy of biology - Johnstone, James, 1870 -1932 (at the University Press, 1914)

The philosophy of biology - Johnstone, James, 1870 -1932 (University Press, 1914)

A phylogenetic classification of animals (for the use of students) - Herdman, W. A. Sir, (William Abbott), 1858 -1924 (Macmillan and Co, 1885)

Physiological and pathological researches; being a reprint of the principal scientific writings of the late T. R. Lewis. In memoriam - Aitken, William, 1825 -1892 (Lewis Memorial Committee, 1888)

The physiology of plants. a treatise upon the metabolism and sources of energy in plants - Pfeffer, W. (Wilhelm), 1845 -1920 (Clarendon Press, 1900)

The physiology of plants; a treatise upon the metabolism and sources of energy in plants - Pfeffer, W. (Wilhelm), 1845 -1920 (Clarendon press, 1900)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1974)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1975)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1976)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1980)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1997)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2009)

Plankton-Studien. Vergleichende Untersuchungen über die Bedeutung und Zusammensetzung der pelagischen Fauna und Flora - Haeckel, Ernst, 1834 -1919 (G. Fischer, 1890)

Planktonic studies: a comparative investigation of the importance and constitution of the pelagic fauna and flora - Field, George Wilton, 1863 -1938 (Govt. Print. Off, 1893)

The plant cell wall; a topical study of architecture, dynamics, comparative chemistry and technology in a biological system - Siegel, S. M. (Sanford Marvin), 1928 - (Pergamon Press, 1962)

The Plant world - Plant World Association. (Plant World Association [etc.], 1917)

The Plasmodiophorales; including a complete host index, bibliography, and a description of diseases caused by species of this order - Karling, John S. (John Sidney), 1898 - (The author, 1942)

Popular botany; the living plant from seed to fruit - Step, Edward, 1855 -1931 (H. Holt and company, 1913)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1872)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1877)

Popular Science Review (1869)

Popular Science Review (1872)

Popular Science Review (1875)

Popular Science Review (1876)

Popular Science Review (1877)

Popular Science Review (1880)

Popular Science Review (1881)

The population problem; a study in human evolution - Carr-Saunders, A. M. (Alexander Morris), 1886 -1966 (Clarendon Press, 1922)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 2003)