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China:  All Rivers Weir Plan--by Li Bing, 250 B.C. on the Min River.  Van Slyke, YANGTZE, p. 36.
China: All Rivers Weir Plan--by Li Bing, 250 B.C. on the Min River. Van Slyke, YANGTZE, p. 36.
Filename: ChinaWC255.jpg
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