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AUTHORS (1-3 共 3)
Stephens, David E. (David Edmund), 1879-
1 Australian wheat varieties in the Pacific coast area Clark, J. Allen (Jacob Allen), 1888- Washington, D.C. : U.S. Dept. of Agriculture, 1920. 1920 评级: 复本
2 Experiments in wheat production on the dry lands of the western United States Stephens, David E. (David Edmund), 1879- Washington, D.C. : U.S. Dept. of Agriculture, 1923. 1923 评级: 复本
3 Experiments with spring cereals at the Eastern Oregon Dry-Farming Substation, Moro, Oreg. Stephens, David E. (David Edmund), 1879- Washington, D.C. : U.S. Dept. of Agriculture, 1917. 1917 评级: 复本
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