Columbia subject headings:
Harvard subject headings:
Salt industry and trade--China--Yangtze River Region--History.
Salt industry and trade--History.
Salt mines and mining--China--Yangtze River Region--History.
Salt mines and mining--History.
Yangtze River Region (China)--Antiquities.
Princeton subject headings:
Excavations (Archaeology)--China--Yangtze River.
Salt industry and trade--China--Yangtze River.
Yangtze River Region (China)--Antiquities.