Browsing Oklahoma Agricultural Experiment Station by Author "Ellsworth, J. O."
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Oklahoma Agricultural Experiment Station, Bulletin no. 162, April 1927: The combine harvester on Oklahoma farms, 1926
Ellsworth, J. O.; Baird, R. W. (Oklahoma Agricultural Experiment Station, 1927-04) -
Oklahoma Agricultural Experiment Station, Bulletin no. 181, June 1929: Types of farming in Oklahoma
Ellsworth, J. O.; Elliot, F. F. (Oklahoma Agricultural Experiment Station, 1929-06)