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Google圖書搜尋
Relation of Spot Cotton Prices to Prices of Futures Contracts and Protection Afforded by Trading in Futures
Leander D. Howell
Leonard Joseph Watson
出版
U.S. Department of Agriculture
, 1938
URL
http://books.google.com.hk/books?id=055XAQAACAAJ&hl=&source=gbs_api