Tractors and horses in the winter wheat belt, Oklahoma, Kansas, Nebraska.
Tolley, H. R. 1889-1958.
Tractors and horses in the winter wheat belt, Oklahoma, Kansas, Nebraska. By H. R. Tolley ... and W. R. Humphries. - Washington, Govt. print off., 1924. - 60 p. illus., map, diagrs. 23 cm. - United States. Dept. of agriculture. Department bulletin no. 1202 .
Joint contribution from Bureau of public roads, Bureau of agricultural economics, Bureau of animal industry.
agr24000326
Horses.
Traction-engines.
S711 / .T65
Tractors and horses in the winter wheat belt, Oklahoma, Kansas, Nebraska. By H. R. Tolley ... and W. R. Humphries. - Washington, Govt. print off., 1924. - 60 p. illus., map, diagrs. 23 cm. - United States. Dept. of agriculture. Department bulletin no. 1202 .
Joint contribution from Bureau of public roads, Bureau of agricultural economics, Bureau of animal industry.
agr24000326
Horses.
Traction-engines.
S711 / .T65