Pehr Kalms Resa till Norra Amerika - Kalm, Pehr, 1716 -1779 (Tidnings & tryckeri-aktiebolagets tryckeri, 1904)

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

Die Pflanzenwelt Deutschlands; Lehrbuch der Formations- biologie. Eine Darstellung der Lebensgeschichte der wildwachsenden Pflanzenvereine und der Kulturflächen - Graebner, Paul, 1871 -1933 (Quelle & Meyer, 1909)

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

Philosophiae natvralis sive Physicae dogmaticae tomvs I[-IV] continens ... continvationem systematis philosophici Christiani L.B. de Wolff - Hanov, M. C. (Michael Christoph), 1695 -1773 (Prostat in officina libraria rengeriana, 1762)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1829)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1870)

The philosophy of zoology, or, A general view of the structure, functions, and classification of animals - Fleming, John, 1785 -1857 (Hurst, Robinson & Co, 1822)

The philosophy of zoology; or, A general view of the structure, functions, and classification of animals - Fleming, John, 1785 -1857 (A. Constable, 1822)

Photo-micrographs and how to make them - Sternberg, George Miller, 1838 -1915 (J. R. Osgood and company, 1883)

Photo-micrography - Spitta, Edmund J. (Edmund Johnson), 1853 -1921 (Scientific Press, 1899)

The pictorial museum of animated nature ... - Knight, Charles, 1791 -1873 (C. Knight, 1844)

The pictorial museum of animated nature - Knight, Charles, 1791 -1873 (C. Cox, 1844)

Der Plauische Grund bei Dresden : mit Hinsicht auf Naturgeschichte und schöne Gartenkunst - Darnstedt, Johann Adolph, 1769 -1844 (In der Frauenholzischen Kunsthandlung, 1799)

The playtime naturalist - Taylor, J. E. (John Ellor), 1837 -1895 (Chatto & Windus, 1889)

The Plough, the loom, and the anvil (J.S. Skinner & Son], 1848)

Pond life - Ash, Edward C. (Edward Cecil), 1888 - (T.C. & E.C. Jack, 1913)

Pond life - Ash, Edward C. (Edward Cecil), 1888 - (T.C. & E. Jack, 1913)

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

The Popular educator: a complete encyclopaedia of elementary, advanced and technical education (Cassell, 1888)

The popular encyclopedia; being a general dictionary of arts, sciences, literature, biography, history, and political economy, reprinted from the American edition of the "Conversations lexicon" ... with dissertations on the rise and progress of literature (Blackie, 1900)

A popular handbook to the microscope - Wright, Lewis, 1838 -1905 (Religious Tract Society, 1895)

A popular handbook to the microscope - Wright, Lewis, 1838 -1905 (Religious Tract Society, 1910)

Popular lectures on the study of natural history and the sciences, vegetable physiology, zoology, the animal and vegetable poisons : and on the human faculties, mental and corporeal, as delivered before the Isle of Wight Philosophical Society - Lempriere, William. (Whittaker, Treacher and Co, 1830)

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, 1875)

Popular Science Review (1865)

Popular Science Review (1867)

Popular Science Review (1869)

Popular Science Review (1870)

Popular Science Review (1872)

Popular Science Review (1873)

Popular Science Review (1874)

Popular Science Review (1878)

Populäre Naturgeschichte der drei Reiche - Jussieu, Adrien de, 1797 -1853 (Verlag von Scheible, Rieger & Sattler, 1845)

Pozsonyi Orvos-Termeszettudomanyi Egyesulet Kozlemenyei - Verein für natur- und heilkunde, Pressburg (1884)

The Practical entomologist - American Entomological Society. (Entomological Society of Philadelphia, 1867)

The Practical entomologist : a monthly bulletin - Entomological Society of Philadelphia (Entomological Society of Philadelphia, 1867)

Practical hints on the selection and use of the microscope. Intended for beginners - Phin, John, 1830 -1913 (The Industrial publication company, 1881)

Practical hints on the selection and use of the microscope. Intended for beginners - Phin, John, 1830 -1913 (The Industrial publication company, 1875)

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

Practical photo-micrography - Barnard, J. Edwin. (Arnold, 1911)

Practical photo-micrography: by the latest methods - Pringle, Andrew. (The Scovill & Adams company, 1890)

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)

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)

The preparation & mounting of microscopic objects - Davies, Thomas (1873)

The preparation & mounting of microscopic objects - Davies, Thomas (R. Hardwicke, 1863)

The preparation & mounting of microscopic objects - Matthews, John, M. D. (Robert Hardwicke, 1873)

The preparation and mounting of microscopic objects - Davies, Thomas (Wood, 1863)

The preparation and mounting of microscopic objects - Matthews, John, M. D. (W.H. Allen, 1890)

The preparation and mounting of microscopic objects - Matthews, John, M. D. (Gibbings, 1896)

Primæ Lineæ cognitionis insectorum - Schluga, Johann Baptist. (Impensis Joannis Pauli Kraus, 1767)

Primae lineae systematis naturæ : nexui naturali omnium evolutionique progressivae per nixus reascendentes superstructi - Gori͡aninov, Pavel Fedorovich, 1796 -1865 (Typis Karoli Krajanis, 1834)

Principles of comparative physiology - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1854)

Principles of general and comparative physiology : intended as an introduction to the study of human physiology : and as a guide to the philosophical pursuit of natural history - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1839)

Principles of physiology, general and comparative - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1851)

Principles of zoölogy : a guide for beginners - Schiedt, Richard Francis Conrad, 1859 -1951 (Examiner Printing House, 1892)

Proceedings and Transactions of the Croydon Microscopical & Natural History Club - Croydon Microscopical; Natural History Club. (1871)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1906)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1918)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1895)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1943)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1871)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1913)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1841)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1961)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1845)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1848)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1871)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1872)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1873)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1884)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1923)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1914)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1948)

Proceedings of the Entomological Society of British Columbia - Entomological Society of British Columbia (Entomological Society of British Columbia, 1955)