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Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1912)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1914)

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The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1894)

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Proceedings of the Seventh Southern Conference on Forest Tree Improvement, June 26-27, 1963, Gulfport, Mississippi - Southern Forest Experiment Station (New Orleans, La.) (Published by the Southern Forest Experiment Station, Forest Service, U.S. Department of Agriculture, 1963)

Prodrome de la flore Belge - De Wildeman, Emile 1866 -1947 (Alfred Castaigne, 1899)

Prodrome de la flore Belge - De Wildeman, Emile 1866 -1947 (Alfred Castaigne, 1898)

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Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1910)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1934)

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A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1888)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1890)