Cost of using tractors on corn belt farms
Reynoldson, L.A., Tolley, H.R.
Cost of using tractors on corn belt farms - Washington 1922 - 1-15 p. - Cost, Corn, Farms United States Department of Agriculture. Farmers Bulletin No. 1297 .
Cost of using tractors on corn belt farms - Washington 1922 - 1-15 p. - Cost, Corn, Farms United States Department of Agriculture. Farmers Bulletin No. 1297 .