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Rhynchophora or weevils of north eastern America - Blatchley, W. S. (Willis Stanley), 1859 -1940 (The Nature Publishing Company, 1916)

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Die Rohstoffe des Pflanzenreiches versuch einer technischen Rohstofflehre des Pflanzenreiches - Wiesner, Julius, 1838 -1916 (W. Engelmann, 1873)

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Seasonal changes in heat content and ether extractive content of chamise - Philpot, Charles Walter, 1939 - (Intermountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1969)

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A sketch of the botany of South Carolina and Georgia - Elliott, Stephen, 1771 -1830 (J.R. Schenck, 1821)

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