ID:DA14509968
Schilletter, J. C. (Julian Claude)
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by Julian Claude Schilletter and Harry Wyatt Richey
McGraw-Hill 1940 McGraw-Hill publications in the agricultural sciences
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by J.C. Schilletter, Robert B. Elwood and Harry E. Knowlton
Works Progress Administration, National Research Project 1939 Report no. A-12 . Studies of changing techniques and employment in agriculture
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