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Proceedings of the Fourteenth Annual Meeting of the American Association of Farmers' Institute Workers Held at Portland, Oreg., August 16, 17, 1909
American Association of Farmers' Institute Workers
American Association of Farmers' Institute Workers. Meeting
United States. Department of Agriculture
出版
U.S. Department of Agriculture, Office of Experiment Stations
, 1910
URL
http://books.google.com.hk/books?id=wMtltQAACAAJ&hl=&source=gbs_api