Columbia subject headings:
Harvard subject headings:
Iron and steel workers--Labor unions--British Columbia.
Labor unions--British Columbia--Jurisdictional disputes.
Metal-workers--Labor unions--British Columbia.
Miners--Labor unions--British Columbia.
Princeton subject headings:
Iron and steel workers--Labor unions--British Columbia.
Labor unions--British Columbia--Jurisdictional disputes.
Metal-workers--Labor unions--British Columbia.
Miners--Labor unions--British Columbia.