ID:DA17010483
Humphries, Walter Raymond
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[by George W. Collier, W.R. Humphries and E.W. McComas]
U.S. Department of Agriculture 1928 Farmer's bulletin / U.S. Department of Agriculture no. 1589
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By H. R. Tolley and W. R. Humphries
Government Printing Office 1924 Department Bulletin / United States Department of Agriculture no. 1202