Nitrogen-fixing bacteria and legumes
Leonard, L.T.
Nitrogen-fixing bacteria and legumes - Washington 1937 - 1-14 p. - Nitrogen, Becteria United States Department of Agriculture. Farmers Bulletin No. 1784 .
Nitrogen-fixing bacteria and legumes - Washington 1937 - 1-14 p. - Nitrogen, Becteria United States Department of Agriculture. Farmers Bulletin No. 1784 .