Catalogue of economic plants in the collection of the U. S. Department of Agriculture Saunders, William, 1822-1900 creator text book Washington Govt. Print. Off 1891 1891
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ENG Botany, Economic S21 .A825 no. 47 U. S. Dept. of Agriculture. [Report no.47] https://www.biodiversitylibrary.org/bibliography/23966 6976646 agr09002348 10.5962/bhl.title.23966