Varieties of alfalfa. - United States. Agricultural Research Service. Crops Research Division; United States. Agricultural Research Service. Crops Research Division (Washington, U.S. Govt. Print. Off., 1968)
Revised ed. of its Alfalfa varieties and areas of adaptation, issued as U.S. Dept. of Agriculture. Leaflet no. 507.
Keywords: Alfalfa -- Varieties; Alfalfa -- Varieties