Technical bulletin
U.S. Dept. of Agriculture, Forest Service ; For sale by the Superintendent of Documents, U.S. Govt. Print. Off
by Frederick V. Waugh
Economic and Statistical Analysis Division, U.S. Dept. of Agriculture 1964 Technical bulletin no. 1316
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by G.A. Wiebe and David A. Reid
United States Department of Agriculture 1961 Technical bulletin no. 1224
by Ewert Aberg, G. A. Wiebe
United States department of agriculture 1946.5 Technical bulletin no. 907
by T. E. Holloway, W.E. Haley, and U.C. Loftin ; with technical descriptions by Carl Heinrich
United States Department of Agriculture 1928 Technical bulletin no. 41