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Google圖書搜尋
Kansas Corn Tests, 1947
Alfred Lester Clapp
Cliff Errett Aubel
Donald Alden Wilbur
F. E. Davidson
Loyal Frederick Payne
Myrtle A. Gunselman
Otto Herman Elmer
Robert John Barnett
出版
Agricultural Experiment Station, Kansas State College of Agriculture and Applied Science
, 1948
URL
http://books.google.com.hk/books?id=Fw5SAQAAMAAJ&hl=&source=gbs_api