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What tractors and horses do on corn-belt farms
- Reynoldson, L. A. (Le Roy August) and Tolley, H. R. (Howard Ross)
- Farmers' bulletin / United States Department of Agriculture ; no. 1295 1923
- Tractors -- Middle West, Horses -- Middle West, horses, draft animals, tractors, plowing, discing, harrowing, rolling, tillage, sowing, harvesting, working animals, and mechanization
- 14 p. : ill. ; 23 cm.
- U.S. Dept. of Agriculture
- Organic Roots Collection