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Google圖書搜尋
Dawson Alfalfa
William Ralph Kehr
其他書名
A New Variety Resistant to Aphids and Bacterial Wilt
出版
University of Nebraska College of Agriculture and Home Economics, Agricultural Experiment Station
, 1968
URL
http://books.google.com.hk/books?id=3DAvzgEACAAJ&hl=&source=gbs_api