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Results of Cooperative Tests of Varieties of Corn, Wheat, Oats, Soy Beans and Cow Peas, 1907

Alfred Theodor Wiancko

出版	Purdue University, Agricultural Experiment Station, 1908
URL	http://books.google.com.hk/books?id=AyQiAQAAMAAJ&hl=&source=gbs_api