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Influence of the tractor on use of horses
- Reynoldson, L. A. (Le Roy August)
- Farmers' bulletin (United States. Dept. of Agriculture) ; no. 1093 1920
- Tractors, Horses, agricultural machinery and equipment, tractors, horses, draft animals, working animals, economic analysis, innovation adoption, technological change, new technology, and farm surveys
- 26 p. : ill., 1 map ; 23 cm.
- U.S. Dept. of Agriculture
- Organic Roots Collection