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Field and Greenhouse Studies Regarding the Sources and Nature of Resistance of Sorghums, Sorghum Vulgare Pers., to the Corn Leaf Aphid, Rhopalosiphum Maidis (Fitch)

Angus Joseph Howitt

出版	Agricultural Experiment Station, Kansas State College of Agriculture and Applied Science, 1956
URL	http://books.google.com.hk/books?id=_GknAQAAMAAJ&hl=&source=gbs_api