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Summaries from Farm-business Analysis Studies in the United States, 1907-39
United States. Bureau of Agricultural Economics
Harvey W. Hawthorne
出版
United States Department of Agriculgure, Bureau of Agricultural Economics
, 1941
URL
http://books.google.com.hk/books?id=6_zKS0nu7A0C&hl=&source=gbs_api
EBook
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