Proceedings of the fourth annual convention of the Association of American Agricultural Colleges and Experiment Stations held at Champaign, Illinois, November 11, 12, and 13, 1890
Washington, D.C, U.S. Dept. of Agriculture, Office of Experiment Stations, 1891
1891
U.S. Department of Agriculture, National Agricultural Library
U.S. Department of Agriculture, National Agricultural Library
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