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L. K. Macy· 1937
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Boris Stern, Eugene George McKibben, John Randall Arnold, Julian Claude Schilletter, Nahum Isaac Stone, Robert Bailey Elwood, Wilmoth Duane Evans, John A. Hopkins, Lloyd E. Arnold, Reuben Austin Griffin, D. Clarence Schmutz, Harry E. Knowlton· 1937
This report traces the development and rate of adoption of three important types of farm automotive equipment and analyzes some of their measurable effects on the organization of agriculture and farm labor requirements.