Columbia subject headings:
Hydraulic engineering--China--Yangtze River Gorges.
Hydraulic engineering--China.
San Xia shui li shu niu (China)
Yangtze River Gorges (China)
Harvard subject headings:
Hydraulic engineering--China
San Xia shui li shu niu (China)
Yangtze River Gorges (China)
Princeton subject headings: