Varieties of alfalfa.
United States.Agricultural Research Service.Crops Research Division.Alfalfa varieties and areas of adaptation.
United States.Agricultural Research Service.Crops Research Division.
United States.Department of Agriculture.
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.
Alfalfa