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Alfalfa Varieties in the United States
Harvey Leroy Westover
Hewitt Merlin Tysdal
出版
U.S. Department of Agriculture
, 1945
URL
http://books.google.com.hk/books?id=UTfrDnbjiS8C&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
Bulletin revised May 1945 by H.M. Tysdal, senior agronomist, Division of Forage Crops and Diseases.
