Columbia subject headings:
Southeast Asia--Commerce--China--Yunnan Sheng--History.
Trade routes--China--Yunnan Sheng--History.
Yunnan Sheng (China)--Commerce--History.
Yunnan Sheng (China)--Commerce--Southeast Asia--History.
Harvard subject headings:
Trade routes--China--Yunnan Sheng.
Yunnan Sheng (China)--Commerce--History.
Princeton subject headings: