ID:DA15343736
Back, Ernest Adna
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by E.A. Back, and R.T. Cotton
Government Printing Office 1926 Department Bulletin / United States Department of Agriculture No. 1393
Available at 1 libraries
[by E.A. Back]
U.S. Dept. of Agriculture [1922] Farmer's bulletin / U.S. Department of Agriculture no. 1275
E.A. Back and R.T. Cotton
U.S. Dept. of Agriculture [1922] Farmer's bulletin / U.S. Department of Agriculture 1260
by E.A. Back
G.P.O. 1919
by E.A. Back and C.E. Pemberton
[U.S. Dept. of Agriculture] 1916
Government Printing Office 1910 Bulletin / U.S. Department of Agriculture, Division of Entomology no. 64, pt. viii . Some miscellaneous results of the work of the Bureau of Entomolgy