Columbia subject headings:
Harvard subject headings:
Tea trade--China--History.
Tea trade--China--Sichuan Sheng--History.
Tea trade--China--Tibet Autonomous Region--History.
Tea trade--China--Yunnan Sheng--History.
Tea--China
Princeton subject headings:
Tea trade--China--Sichuan Sheng--History.
Tea trade--China--Tibet--History.
Tea trade--China--Yunnan Sheng--History.