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Google圖書搜尋
Performance of Certified Seed Lots of Dawson Alfalfa
William Ralph Kehr
George Rudolph Manglitz
出版
University of Nebraska-Lincoln, Institute of Agriculture and Natural Resources, Agricultural Experiment Station
, 1976
URL
http://books.google.com.hk/books?id=YRw7zgEACAAJ&hl=&source=gbs_api