Public domain
Chinese water conservancy experts examining contour maps at the University of Maryland, where they are taking courses at the UNRRA (United Nations Relief and Rehabilitation Administration) training center. From left: Lin Ping-yi, Liu Chung-juci, Chang Jen, Hsu Shih-ta, Wu Yui-sin, Tsai Pang-lin, Cha
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Credit lineChinese water conservancy experts examining contour maps at the University of Maryland, where they are taking courses at the UNRRA (United Nations Relief and Rehabilitation Administration) training ce. 1944-01-01. Tillery, Risdon. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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