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Sugar Beet Experiments During 1898

Alfred James McClatchieEdward Marshall BoggsJames William ToumeyRobert Humphrey ForbesTheodore Dru Alison Cockerell

出版	University of Arizona, 1897
URL	http://books.google.com.hk/books?id=t6hQAQAAMAAJ&hl=&source=gbs_api