Columbia subject headings:
Harvard subject headings:
Coal miners--China--Jiaozuo Shi--History--20th century--Sources.
Jiaozuo Shi (China)--Social conditions--Sources.
Strikes and lockouts--Coal mining--China--Jiaozuo Shi--History--20th century--Sources.
Princeton subject headings:
Coal miners--China--Jiaozuo Shi--History--20th century--Sources.
Jiaozuo Shi (China)--Social conditions--Sources.
Strikes and lockouts--Coal mining--China--Jiaozuo Shi--History--20th century--Sources.