Columbia subject headings:
Harvard subject headings:
Labor unions--China--Sichuan Sheng--History--20th century.
Sichuan Sheng (China)--History--20th century.
Sichuan Sheng zong gong hui--History--20th century.
Princeton subject headings:
Labor unions--China--Sichuan Sheng--History.
Sichuan Sheng (China)--History.