Tractors and horses in the winter wheat belt, Oklahoma Kansas, Nebraska
Tolley, H.R., Humpheries, W.R.
Tractors and horses in the winter wheat belt, Oklahoma Kansas, Nebraska - Washington 1924 - 1-60 p. - Horses, Winter, Wheat United State of Department of Agriculture. Bulletin No. 1202 .
Tractors and horses in the winter wheat belt, Oklahoma Kansas, Nebraska - Washington 1924 - 1-60 p. - Horses, Winter, Wheat United State of Department of Agriculture. Bulletin No. 1202 .