Papers read before the Purbeck Society - Purbeck Society. (1856)

Parasites : a treatise on the entozoa of man and animals, including some account of the ectozoa - Cobbold, T. Spencer (Thomas Spencer), 1828 -1886 (J. & A. Churchill, 1879)

Parasites a treatise on the entozoa of man and animals including some account of the ectozoa - Cobbold, T. Spencer (Thomas Spencer), 1828 -1886 (J. & A. Churchill, 1879)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1918)

Parasitology (Cambridge University Press, 1920)

Part I. Palæontology - Hall, James, 1811 -1898 (Govt. print. off, 1877)

Parte práctica de botánica del caballero Cárlos Linneo, que comprehende las clases, órdenes, géneros, especies y variedades de las plantas, con sus caracteres genéricos y especificos, sinónimos mas selectos, nombres triviales, lugares donde nacen, y propriedades - Linné, Carl von, 1707 -1778 (En la Imprenta Real, 1784)

Patterns and problems of development - Child, Charles Manning, 1869 -1954 (The University of Chicago Press, 1941)

Periódico zoológico - Sociedad Entomológica Argentina. (Sociedad Entomica Argentina, 1874)

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

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1971)

Petrefactenkunde Deutschlands / von Fr. Aug. Quenstedt - Quenstedt, Fr. Aug. von (Friedrich August), 1809 -1889 (L.F. Fues, 1884)

Petrefactenkunde Deutschlands / von Fr. Aug. Quenstedt - Quenstedt, Fr. Aug. von (Friedrich August), 1809 -1889 (L.F. Fues, 1881)

Petrifactions and their teachings, or, A hand-book to the gallery of organic remains of the British Museum - British Museum (Natural History). Department of Zoology. (H.G. Bohn, 1851)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1909)

Die Pflanzenwelt Afrikas, insbesondere seiner tropischen Gebiete : Grundzge der Pflanzenverbreitung im Afrika und die Charakterpflanzen Afrikas - Engler, Adolf, 1844 -1930 (W. Engelman, 1910)

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

The Philosophical magazine and journal : comprehending various branches of science, the liberal and fine arts, agriculture, manufactures, and commerce (R. Taylor, 1822)

The Philosophical magazine and journal : comprehending various branches of science, the liberal and fine arts, agriculture, manufactures, and commerce (R. Taylor, 1826)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1864)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1882)

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)

Phylogenie und System der Mollusken - Ihering, H. von (Hermann), 1850 -1930 (M. Diesterweg, 1922)

The physical geology and geography of Great Britain : a manual of British geology - Woodward, Horace B. (Horace Bolingbroke), 1848 -1914 (E. Stanford, 1878)

Phytoplankton productivity in Lake Wabamun, Alberta and the effect of thermal effluent - Noton, L. R. (1974)

A pictorial atlas of fossil remains : consisting of coloured illustrations selected from Parkinson's "Organic remains of a former world," and Artis's "Antediluvian phytology" - Mantell, Gideon Algernon, 1790 -1852 (H.G. Bohn, 1850)

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)

Die Pithecanthropus-Schichten auf Java. Geologische und paläontologische Ergebnisse der Trinil-Expedition (1907 und 1908), ausgeführt mit Unterstützung der Akademischen Jubiläumsstiftung der Stadt Berlin und der Königlich bayerischen Akademi der Wissenschaften - Königlich Bayerische Akademie der Wissenschaften (W. Engelmann, 1911)

Pittonia :a series of papers relating to botany and botanists - Greene, Edward Lee, 1843 -1915 (Doxey & Co. [etc.], 1887)

A plain and easy account of the land and fresh-water mollusks of Great Britain : containing descriptions, figures, and a familiar account of the habits of each species - Tate, Ralph, 1840 -1901 (R. Hardwicke, 1866)

A plain and easy account of the land and freshwater mollusks of Great Britain - Vincent Brooks, Day & Son, (R. Hardwicke, 1866)

Plant disease surveys in the Southeastern United States in 1943 - United States. Plant Disease Survey. (Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture, 1944)

Plant disease surveys in the Western United States in 1943 - United States. Plant Disease Survey. (Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture, 1944)

Plant lists : Venezuela - Pittier, Henri, 1857 -1950 (1917)

Plantarum vascularium genera :secundum ordines naturales digesta eorumque differentiae et affinitates tabulis diagnostacis expositae - Weidmann. (Libraria Weidmannia, 1836)

Pleasing, fascinating, interesting things beautiful for the indoors - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Loveland Goldfish Farm, 1941)

Pleasing, fascinating, interesting things beautiful for the indoors - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Loveland Goldfish Farm, 1940)

A pocket guide to the British non-marine Mollusca, including fossil forms which occur in the post-pliocene deposits, excepting the forest bed series - Swanton, Ernest W. (C. Mosley, 1906)

Popular British conchology. A familiar history of the molluscs inhabiting the British Isles - Sowerby, George Brettingham, 1788 -1854 (Lovell Reeve, 1854)

Popular conchology, or, The shell cabinet arranged according to the modern system : with a detailed account of the animals, and a complete descriptive list of the families and genera of recent and fossil shells - Catlow, Agnes, 1807? -1889 (Longman, Brown, Green, and Longmans, 1854)

Popular conchology : or, The shell cabinet arranged: being an introduction to the modern system of conchology, with a sketch of the natural history of the animals, an account of the formation of the shells, and a complete descriptive list of the families and genera - Catlow, Agnes, 1807? -1889 (Longman, Brown, Green, and Longmans, 1843)

A popular history of the Mollusca; comprising a familiar account of their classification, instincts and habits, and of the growth and distinguishing characters of their shells - Roberts, Mary, 1788 -1864 (Reeve and Benham, 1851)

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, 1876)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1880)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1883)

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, 1896)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1899)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1903)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1904)

The post-Tertiary geology of Cornwall - Ussher, William Augustus Edmond, 1849 -1920 (Printed for private circulation by Stephen Austin, 1879)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1999)

The powers of the Creator displayed in the creation; or, Observations on life amidst the various forms of the humbler tribes of animated nature - Dalyell, John Graham, 1775 -1851 (J. Van Voorst, 1851)

The powers of the Creator displayed in the creation; or, Observations on life amidst the various forms of the humbler tribes of animated nature - Dalyell, John Graham, 1775 -1851 (J. Van Voorst, 1858)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1921)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1922)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1923)

Practical zoology - Hegner, Robert William, 1880 -1942 (Macmillan, 1915)

Practical zoölogy : an elementary text-book treating of the structure, life, history, and relations of animals - Davison, Alvin, 1868 -1915 (American Book Company, 1906)

Précis analytique de l'histoire naturelle des mollusques terrestres et fluviatiles qui vivent dan le Bassin Sous-Pyrénéen - Noulet, J.-B. (Jean-Baptiste), 1802 -1890 (J.-B. Paya, 1834)

Prehistoric Europe, a geological sketch - Geikie, James, 1839 -1915 (E. Stanford, 1881)

A preliminary biological survey of waters in the Birch Mountains, Alberta - Alberta. Fish; Wildlife Division. (Fish & Wildlife Division, Dept. of Lands and Forests, 1968)

Preliminary catalogue of the marine mollusca of the Pacific Coast of Canada, with notes upon their distribution - Taylor, George W. (s.n, 1895)

A preliminary list of fossil mastodon and mammoth remains in Illinois and Iowa - Udden, Johan August, 1859 -1932 (Augustana Book Concern, printers, 1905)

Preliminary report of explorations in Nebraska and Dakota, in the years 1855-'56-'57 - Warren, Gouverneur Kemble, 1830 -1882 (Govt. Print. Off, 1875)

Preliminary report of the United States Geological Survey of Wyoming : and portions of contiguous territories, (being a second annual report of progress) - Geological; Geographical Survey of the Territories (U.S.) (Govt. Print. Off, 1872)

A preliminary report on the aquatic invertebrate fauna of the Yellowstone National Park, Wyoming, and of the Flathead Region of Montana - Forbes, Stephen Alfred, 1844 -1930 (Govt. Prtg. Off, 1893)

A preliminary report on the biology of Harding County, northwestern South Dakota - Visher, Stephen Sargent, 1887 -1967 (State Publishing Co, 1914)

Preliminary report on the dredging in Lake Superior - Smith, Sidney I. (Sidney Irving) 1843 -1926 (s.n, 1871)

Preliminary report on the fish and fisheries of Ontario - Wright, R. Ramsay (Robert Ramsay), 1852 -1933 (s.n, 1892)

A preliminary report on the geology of Louisiana - Atkinson, George Francis, 1854 -1918 (1899)

Preoperational investigations of zoobenthos in southeastern Lake Michigan near the Cook nuclear plant - University of Michigan. Great Lakes Research Division. (Great Lakes Research Division, University of Michigan, 1975)

Die Preussische expedition nach Ost-Asien : nach amtlichen quellen. Zoologischer Theil - Martens, Eduard von, 1831 -1904 (Königlichen geheimen ober-hofbuchdruckerei (R. v. Decker), 1867)

Die Preussische expedition nach Ost-Asien : nach amtlichen quellen Zoologischer Theil - Martens, Eduard von, 1831 -1904 (Verlag der Königlichen geheimen ober-hofbuchdruckerei (R. v. Decker), 1867)

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

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

Principles of animal ecology - Allee, W. C. (Warder Clyde), 1885 -1955 (Saunders Co, 1949)

Principles of economic zoölogy - Daugherty, L. S. (Lewis Sylvester) 1857 -1919 (W. B. Saunders Company, 1917)