Columbia subject headings:
Silk Road--Antiquities.
Tibet, Plateau of--Antiquities.
Trade routes--China--Qinghai Sheng--History--To 1500.
Harvard subject headings:
Silk Road--Antiquities.
Tibet, Plateau of--Antiquities.
Trade routes--China--Qinghai Sheng--History--To 1500.
Princeton subject headings:
Silk Road--Antiquities.
Tibet, Plateau of--Antiquities.
Trade routes--China--Qinghai Sheng--History--To 1500.