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Google圖書搜尋
Oat Variety and Cultural Tests in Oklahoma, 1925-1947
Alva Marion Schlehuber
Theodore Herron Johnston
Walter M. Osborn
出版
Oklahoma Agricultural Experiment Station
, 1948
URL
http://books.google.com.hk/books?id=v28pAQAAMAAJ&hl=&source=gbs_api