Columbia subject headings:
Harvard subject headings:
Coal miners--British Columbia--Ladysmith--History.
Coal mines and mining--British Columbia--Ladysmith--History.
Coal mines and mining--Social aspects--British Columbia--Ladysmith--History.
Ladysmith (B.C.)--Social conditions.
Strikes and lockouts--Coal mining--British Columbia--Vancouver Island--History.
Princeton subject headings:
Coal miners--British Columbia--Ladysmith--History.
Coal mines and mining--Social aspects--British Columbia--Ladysmith--History.
Ladysmith (B.C.)--Social conditions--History.
Strikes and lockouts--Coal mining--British Columbia--Vancouver Island--History.