Tractors and horses in the winter wheat belt
Subtitle: Oklahoma, Kansas, Nebraska
By: By H. R. Tolley ... and W. R. Humphries
Contributors: Humphries, W. R. (Walter Raymond), 1886- joint author
Series: United States. Dept. of agriculture -- Department bulletin no. 1202
Publisher: Govt. print off.
Published: 1924
Place of publication: Washington
Language: eng
Number of pages: 60
Subjects: Horses; Traction-engines
Notes: Joint contribution from Bureau of public roads, Bureau of agricultural economics, Bureau of animal industry.