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A flora of North America : containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico : arranged according to the natural system
by John Torrey and Asa Gray
Bok Engelsk 1838
Explorations and surveys for a railroad route from the Mississippi River to the Pacific Ocean. War Department : report on the botany of the expedition
By John Torrey, Asa Grey ; Route near the...
Bok Språk ikke angitt 1800