Changes in Technology and Labor Requirements in Crop Production: Wheat and Oats, by Robert B. Elwood, Lloyd E. Arnold, D. Clarence Schmutz, and Eugene G. McKibben. Philadelphia, Works Progress Administration, National Research Project, Report A-10, 1939, XV, 182 pages

Albert A. Thornbrough

American Journal of Agricultural Economics, 1940, vol. 22, issue 1, 402-404a

Date: 1940
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