Palaeontology - Palaeontological Association (Palaeontological Association, 1976)

Palaeontology - Palaeontological Association (Palaeontological Association, 1982)

Palaeontology - Palaeontological Association (Palaeontological Association, 1984)

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

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1895)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1949)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1973)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1984)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1988)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1991)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1996)

Die pantopoden des golfes von Neapel und der angrenzenden meeres abschnitte - Dohrn, Anton, 1840 -1909 (W. Engelmann, 1881)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1943)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1947)

Papers on Tipulidae - Alexander, Charles P. (Charles Paul), 1889 -1981 (s.n.], 1916)

Papillons - Séguy, E. A. (Emile-Allain), 1877 -1951 (Tolmer, 1925)

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

The people's natural history, embracing Living animals of the world and Living races of mankind - Cornish, C. J. (Charles John), 1858 -1906 (The University society, 1903)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Petites nouvelles entomologiques (E. Deyrolle, 1869)

Die Pflanze und ihr Leben. Populäre Vorträge, von M. J. Schleiden. Mit 5 farbigen Tafeln und 15 Holzschnitten - Schleiden, M. J. (Matthias Jacob), 1804 -1881 (W. Engelmann, 1850)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1905)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1911)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1912)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1913)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1911)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1914)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1921)

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)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain (J. & A. Churchill, 1868)

Phases of animal life, past and present - Lydekker, Richard, 1849 -1915 (Longmans, Green, and Co, 1892)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1908)

The Philosophical magazine : or Annals of chemistry, mathematics, astronomy, natural history and general science (Richard Taylor and Co, 1827)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1830)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1885)

Philosophical transactions. Series A: Mathematical and physical sciences - Royal Society (Great Britain) (1887)

Philosophie des organischen : Gifford-vorlesungen gehalten an der Universität Aberdeen in den Jahren 1907-1908 - Driesch, Hans, 1867 -1941 (W. Engelmann, 1909)

A Phylogenetic analysis and taxonomy of iguanian lizards (Reptilia, Squamata) - Etheridge, Richard, 1929 - (University of Kansas, 1989)

Phylogenetic analysis of Morpho butterflies (Nymphalidae, Morphinae) : implications for classification and natural history - Penz, Carla Maria, 1961 - (American Museum of Natural History, 2002)

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

Phylogeny and taxonomic revision of the endemic Malagasy genus Ptychochromis (Teleostei, Cichlidae), with the description of five new species and a diagnosis for Katria, new genus - Sparks, John S. (American Museum of Natural History, 2006)

Physiological genetics - Goldschmidt, Richard, 1878 -1958 (McGraw-Hill Book Company inc, 1938)

The physiology and pharmacology of the pituitary body - Van Dyke, Harry Benjamin, 1895 - (The University of Chicago Press, 1936)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1978)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1979)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1981)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1847)

Die pilze in morphologischer, physiologischer, biologischer und systematischer beziehung - Zopf, W. (Wilhelm), 1846 -1909 (E. Trewendt, 1890)

Placochelys placodonta aus der Obertrias des Bakony - Jaekel, Otto, 1863 -1929 (Druck der K. und K. hofbuchdruckerei V. Hornyánszky, 1907)

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

The plant : a biography - Henfrey, Arthur, 1819 -1859 (H. Bailliere, 1848)

The plant : a biography : in a series of popular lectures - Henfrey, Arthur, 1819 -1859 (H. Bailliere, 1848)

The plant; a biography. In a series of thirteen popular lectures - Henfrey, Arthur, 1819 -1859 (H. Bailliere, 1853)

The plant, a biography in a series of popular lectures - Henfrey, Arthur, 1819 -1859 (H. Bailliere, 1848)

Plant disease and its relation to animal life - Wright, E. F. (S. Sonnenschein, 1903)

Plant growth substances - University of Wisconsin. (University of Wisconsin Press, 1951)

Plant life and evolution (H. Holt, 1911)

Plant morphogenesis - Sinnott, Edmund W. (Edmund Ware), 1888 -1958 (McGraw-Hill, 1960)

Plant physiology, with special reference to plant production - Duggar, Benjamin M. (Benjamin Minge), 1872 -1956 (MacMillan, 1920)

Plant physiology, with special reference to plant production - Duggar, Benjamin M. (Benjamin Minge), 1872 -1956 (The Macmillan company, 1911)

Pomologische Monotshefte - Lucas, Eduard, 1816 -1882 (E. Ulmer, 1874)

Popular natural history : a description of animal life, from the lowest forms up to man - Kingsley, J. S. (John Sterling), 1854 -1929 (Estes & Lauriat, 1890)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1885)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1887)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1909)

Popular Science Review (1865)

A popular treatise on the physiology of plants for the use of gardeners or for students of horticulture and of agriculture - Sorauer, Paul, 1839 -1916 (Longmans, Green, and Co, 1895)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1969)

Practical botany, structural and systematic, the latter portion being an analytical key to the wild flowering plants, trees, shrubs, ordinary herbs, sedges and grasses of the northern and middle United States east of the Mississippi - Koehler, August (H. Holt and Company, 1876)

Practical microscopy - Davis, George E. (George Edward), 1907 (D. Bogue, 1882)

Practical taxidermy : a manual of instruction to the amateur in collecting, preserving, and setting up natural history specimens of all kinds : to which is added a chapter upon the pictorial arrangement of museums - Browne, Montagu (L. Upcott Gill, 1884)

A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures - Quekett, John, 1815 -1861 (H. Bailliere, 1848)

A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures - Quekett, John, 1815 -1861 (H. Bailliere; [etc., etc.], 1852)

Die preussische expedition nach Ost-Asien : nach amtlichen quellen V. 1 Zoologischer theil - Martens, Eduard von, 1831 -1904 (R. v. Decker, 1876)