Columbia subject headings:
China--Boundaries.
China--History--Tang dynasty, 618-907.
Yunnan Sheng (China)--History.
Harvard subject headings:
China--Boundaries.
China--History--Tang dynasty, 618-907.
Yunnan Sheng (China)--History.
Princeton subject headings:
China--Boundaries.
China--History--Tʻang dynasty, 618-907.
Yunnan Sheng (China)--History.