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(Tennessee Valley Authority) |
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由田纳西河谷管理局(Tennessee Valley Authority)负责推动的水坝兴建工程,1942年 出处: Palmer, Alfred T., photographer. "Early stages of construction work at the TVA's Douglas Dam, Tenn." June 1942. America from the Great Depression to World War II: Color Photographs from the FSA-OWI, 1939-1945, Library of Congress. |
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