American medicinal plants of commercial importance
Sievers, A.F.
American medicinal plants of commercial importance - Washington 1930 - 1-74 p. - Plants United States Department of Agriculture. Miscellaneous Publication No. 77 .
American medicinal plants of commercial importance - Washington 1930 - 1-74 p. - Plants United States Department of Agriculture. Miscellaneous Publication No. 77 .