ID:DA0788901X
Sprague, George Frederick
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editor, G. F. Sprague
American Society of Agronomy 1977, c1976 [2d ed.] Agronomy no. 18
Available at 6 libraries
edited by George F. Sprague
Academic Press 1955 Agronomy 5
Available at 7 libraries
by George F. Sprague
U.S. Dept. of Agriculture 1932 Technical bulletin / United States Department of Agriculture no.292
Available at 1 libraries
