Harvesting wheat with a combined harvester-thresher in the Great Plains region, 1926
Subtitle: By R. S. Kifer, W. R. Humphries [and] J. H. Martin. A preliminary report. April, 1927
Contributors: Kifer, R. S. (Russell Stanley), b. 1898; Humphries, Walter Raymond, 1886-; Martin, John H. (John Holmes), 1893-
Publisher: U. S. Government Printing Office]
Published: 1927
Place of publication: [Washington
Language: eng
Number of pages: 26
Subjects: Harvesting machinery; Wheat
Notes: At head of title:  United States Department of Agriculture, Bureau of Agricultural Economics, Bureau of Public Roads, Bureau of Plant Industry, in cooperation with Texas, Oklahoma, Nebraska, and Montana Colleges of Agriculture.