Columbia subject headings:
Harvard subject headings:
Bank notes--China--History.
Guo ying Donghe yin zhi gong si. 501 chang--History.
Safety paper
Princeton subject headings:
Bank notes--China--Sichuan Sheng--History.
Dong He yin zhi gong si. 501 chang--History.
Mints--China--Sichuan Sheng--History.
Paper money--China--Sichuan Sheng--History.