ID:DA17009440
Hopper, Turner Harcourt
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by J. L. Cartter, T. H. Hopper
U.S. Dept. of Agriculture 1942 Technical bulletin / United States Department of Agriculture no. 787
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[P.J. Olson, H.L. Walster and T.H. Hopper]
Agricultural Experiment Station, North Dakota Agricultural College 1927 Bulletin / Agricultural Experiment Station, North Dakota Agricultural College 207
T.H. Hopper
Agricultural Experiment Station, North Dakota Agricultural College 1925 Bulletin / Agricultural Experiment Station, North Dakota Agricultural College 192