ID:DA16764070
Willaman, John James
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by J.J. Willaman and Bernice G. Schubert
Agricultural Research Service, U.S. Dept. of Agriculture 1961 Technical bulletin / United States Department of Agriculture no. 1234
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J.J. Willaman, G.O. Burr, and F.R. Davison
University of Minnesota 1924 Bulletin / Agricultural Experiment Station, University of Minnesota 207