Costs of operating various sizes and types of tractors in Marion County, Oregon
By: [Warren J. Green and D. Curtis Mumford].
Contributors: Mumford, D. Curtis 1900-
Series: Station bulletin / Agricultural Experiment Station, Oregon State University -- 599.; Station bulletin (Oregon State University. Agricultural Experiment Station) -- 599.
Publisher: Agricultural Experiment Station, Oregon State University
Published: 1965
Place of publication: Corvallis, Ore
Language: eng
Number of pages: 24
Subjects: Farm tractors -- Economic aspects -- Oregon -- Marion County.
Notes: Cover title.