Oesterreichische botanische Zeitschrift (A. Skofitz, 1923)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1856)

Ohio mycological bulletin - Ohio State University. (Ohio State University, 1903)

On molecular and microscopic science - Somerville, Mary Fairfax, 1780 -1872 (J. Murray, 1869)

On molecular and microscopic science - Somerville, Mary, 1780 -1872 (J. Murray, 1869)

The organic constituents of plants and vegetable substances and their chemical analysis - Wittstein, Georg Christian, 1810 -1887 (MCarron, Bird & Co, 1878)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1888)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1914)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1877)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1898)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1908)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1918)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1919)

Parasites and predators of the Mexican bean beetle in the United States - Howard, Neale F. (Neale Frederick), 1890 - (U.S. Dept. of Agriculture, 1936)

The parasitic fungi of New Jersey - Schwarze, Carl Alois, 1886 - (New Jersey Agricultural Experiment Stations, 1917)

Part I. The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling news litho. co, 1913)

Parthenogenesis und Apogamie im Pflanzenreiche - Winkler, Hans, 1877 - (G. Fischer, 1908)

Pathobiology of Burenella dimorpha Jouvenaz and Hazard (Microspora: Microsporida) - Jouvenaz, Donald P., 1936 - (1982)

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

The Pfizer handbook of microbial metabolites - Miller, Max W. (Blakiston Division, McGraw-Hill, 1961)

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Physiology of fungi - Cochrane, Vincent W. (Wiley, 1958)

Physiology of the fungi - Lilly, Virgil Greene. (McGraw-Hill, 1951)

Phytogeography of Nebraska. 1. General survey by Roscoe Pound and Frederic E. Clements - Clements, Frederic E. (Frederic Edward), 1874 -1945 (Published by the Seminar, 1900)

Die pilze, eine einführung in die kenntnis ihrer formenreihen ... - Lindau, Gustav, 1866 -1923 (G. F. Göschen, 1912)

Die Pilze (Fungi) von Tirol, Vorarlberg und Liechtenstein - Magnus, P. (Paul), 1844 -1914 (Verlag der Wagner'schen Universitts-Buchh, 1905)

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

Die Pilze Schlesiens - Schroeter, J. (J.U. Kern's Verlag, 1889)

Plant ecology - McDougall, W. B. (Walter Byron), 1883 - (Lea & Febiger, 1941)

Plant-life - Hall, Charles A. (Charles Albert), 1872 -1965 (A. & C. Black, 1915)

Plant-life - Hall, Charles A. (Charles Albert), 1872 -1965 (Black, 1915)

Plant life of Alabama : an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state - Mohr, Charles (Charles Theodore), 1824 -1901 (Brown Printing Co, 1901)

Plant life of Alabama, an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state - Mohr, Charles (Charles Theodore), 1824 -1901 (Brown printing co, 1901)

Plant life of Alabama. An account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state. Prepared in cooperationwith the Geological Survey of Alabama - Mohr, Charles (Charles Theodore), 1824 -1901 (Govt. Print. Off, 1901)

Plants of Iowa; a preliminary list of the native and introduced plants of the state, not under cultivation - Greene, Wesley. (Bishard brothers, printers, 1907)

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

Pozsonyi Orvos-Termeszettudomanyi Egyesulet Kozlemenyei - Verein für natur- und heilkunde, Pressburg (1894)

Pozsonyi Orvos-Termeszettudomanyi Egyesulet Kozlemenyei - Verein für natur- und heilkunde, Pressburg (1901)

A preliminary list of Maine fungi - Ricker, Percy Leroy, 1878 -1973 (1902)

President's Address, Papers & Reports / West Kent Natural History, Microscopical & Photographic Society - West Kent Natural History Microscopical; Photographic Society. (1872)

Primitiae florae costaricensis - Durand, Th. (Théophile), 1855 -1912 (Jardin botanique de l'état, 1891)

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

The principles of applied zoology - Wardle, Robert A. (Robert Arnold), 1890 -1974 (Longmans, Greem, and co, 1929)

The principles of bacteriology - Royal College of Physicians of Edinburgh. (Open Court, 1899)

The principles of bacteriology - Hueppe, Ferdinand Adolph Theophil, 1852 - (Open Court, 1899)

The principles of biology, by J. I. Hamaker - Hamaker, John Irvin, 1869 - (P. Blakiston, 1913)

The principles of biology - Hamaker, J. I. (John Irvin), 1869 - (P. Blakiston's Sons & Co, 1913)

Principles of botany - Bergen, Joseph Y. (Joseph Young), 1851 -1917 (Ginn, 1906)

Principles of botany - Bergen, Joseph Y. (Joseph Young), 1851 -1917 (Ginn & company, 1906)

Principles of botany - Bergen, Joseph Y. (Joseph Young), 1851 -1917 (Ginn & Company, 1906)