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Weber, William A.: Handbook of Plants of the Colorado Front Range. Keys for the Identification of the Ferns,Conifers, and Flowering Plants of the Central Rocky Mountains from Pikes Peak to Rocky Mountain National Park and from the Plains to the Continental Divide. 2nd ed. 1961. 78 figs. (line drawings). XIII,232 p. gr8vo. Cloth. (45485) 27.82
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