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Google圖書搜尋
Two Barley Blights, with Comparison of Species of Helminthosporium Upon Cereals
Louis Hermann Pammel
出版
Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts
, 1910
URL
http://books.google.com.hk/books?id=ZolIAQAAMAAJ&hl=&source=gbs_api