Washington, D.C. :United States Department of Agriculture, Bureau of Plant Industry, Forage Crop Investigations,1912. | U.S. Department of Agricultur

Washington: Government Printing Office, 1915.

Washington, D.C.: U.S. Dept. of Agriculture, Bureau of Plant Industry, 1911.

Washington, D.C. :United States Department of Agriculture, Bureau of Plant Industry, Forage Crop Investigations,1909. | U.S. Department of Agriculture, National Agricu

Washington, D.C.: U.S. Dept. of Agriculture, 1916.

Washington, D.C.: U. S. Dept. of Agriculture, 1916.

Washington, D.C. :G.P.O.,1910. | University of Florida, George A. Smathers Libraries

Washington, D.C.: U.S. Dept. of Agriculture, 1924.

Washington, D.C. :United States Department of Agriculture, Bureau of Plant Industry, Forage-Crop Investigations,1913. | U.S. Department of Agriculture, National Agricu

Washington, D.C.: U.S. Dept. of Agriculture, 1922.

Washington, D.C. :United States Department of Agriculture, Bureau of Plant Industry, Forage-Crop Investigations,1909. | U.S. Department of Agriculture, National Agricu