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Doctor O.R. Sweeney, head of chemical and mining engineering, has been at the college for twenty years. He has been outstanding in developing byproducts from agricultural wastes. Iowa State College. Ames, Iowa
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Credit lineDoctor O.R. Sweeney, head of chemical and mining engineering, has been at the college for twenty years. He has been outstanding in developing byproducts from agricultural wastes. Iowa State College. A. 1942-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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Doctor O.R. Sweeney, head of chemical and mining engineering, has been at the college for twenty years. He has been outstanding in developing byproducts from agricultural wastes. Iowa State College. Ames, Iowa
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