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Outlines of evolutionary biology - Dendy, Arthur, 1865 -1925 (Constable, 1912)

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Outlines of geology, prepared for the use of the junior class of Columbia College - Renwick, James, 1792 -1863 (Printed by Henry Ludwig, 1838)

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Outlines of the history of botany - Harvey-Gibson, R. J. (Robert John), 1860 -1929 (Black, 1919)

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Outlines of the natural history of Great Britain and Ireland, containing a systematic arrangement and concise description of all the animals, vegetables and fossiles which have hitherto been discovered in these kingdoms - Berkenhout, John, 1730 -1791 (Printed for P. Elmsly (Successor to Mr. Vaillant), 1770)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1896)

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Oxford gardens. Based upon Daubeny's Popular guide to the physick garden of Oxford : with notes on the gardens of the colleges and on the University Park - Gunther, R. T. (Robert Theodore), 1869 -1940 (Parker, 1912)

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Palaeontographica (Theodor Fischer, 1859)

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Palaeontology - Palaeontological Association (Palaeontological Association, 1972)

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

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Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1891)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1896)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1904)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1914)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

[Pamphlets on agriculture in Guam] (s.n, 1905)

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Papilio - Edwards, Henry, 1827 -1891 (New York Entomological Club, 1884)

Parametric identification of nonlinear stochastic systems applied to ocean vehicle dynamics - Hayes, Michael Ney. (Massachusetts Institute of Technology, 1971)

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)

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

Pathologie interne - Cadéac, Célestin, 1858 -1952 (J.B. Baillière, 1908)

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