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Annual report of the Ohio State University Agricultural College Extension Service
The Ohio State University Agricultural College Extension Service in cooperation with the United States Department of Agriculture.
Description based on: July 1, 1917/June 30, 1918.
Latest issue consulted: July 1, 1919/June 30, 1920.
Vols. for <1917/1918-1919/1920> issued as numbered issues of Circular of the Ohio State University Agricultural Extension Service.
Ohio State University. Agricultural Extension Service
Annual report of the Ohio Cooperative Extension Service
Ohio State University. Cooperative Extension Service.