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| Agriculture in the United States and the Soviet Union / . Pope, Fletcher, 1922- 4n Washington, D.C. : Economic Research Service, U.S. Dept. of Agriculture, 1973. | |
| Agriculture in the United States and the Soviet Union / . Walters, Harry Eugene, 1932- 4n : Regional Analysis Division, Economic Research Service, U. S. Dept. of Agriculture, 1963. | |
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