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Directory of organization and field activities of the Department of Agriculture
(1962)
Agriculture handbook : AH
(1949)
Miscellaneous publication / United States Department of Agriculture, Bureau of Plant Industry
(1927)
Report of the Iowa Agricultural Experiment Station : new findings for farm folk
(1953)
Research bulletin / Agricultural Experiment Station, Iowa State College
(1957)
Bulletin / Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts
(1939)