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Google圖書搜尋
A Study of the Inheritance in Alfalfa of Resistance to Common Leaf Spot Caused by Pseudopeziza Medicaginis (Lib.) Sacc
Ronald Dan Ensign
出版
Cornell University
, 1952
URL
http://books.google.com.hk/books?id=fw5CAAAAYAAJ&hl=&source=gbs_api