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Guide to Agriculture, U.S.A.
Arthur Franklin Raper
Edward M. Harwell
William Walter Reitz
Martha Jarrell Raper
出版
Office of Foreign Agricultural Relations and Bureau of Agricultural Economics, U.S. Department of Agriculture
, 1951
URL
http://books.google.com.hk/books?id=2NrQAQAACAAJ&hl=&source=gbs_api