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Minimum Isolation Distances for Varieties and Types of Brassica (cabbage, Cauliflower, Kale, Etc.) Recommended ... June 25, 1943, Mount Vernon, Washington

Roy Magruder

出版	1943
URL	http://books.google.com.hk/books?id=O3G-YgEACAAJ&hl=&source=gbs_api