Columbia subject headings:
Labor unions--Political activity--Canada--History.
Radicalism--Canada--History.
Socialism--Canada--History.
Harvard subject headings:
Labor unions--Canada--Political activity--History.
Labor unions--Political activity--Canada--History.
Radicalism--Canada--History.
Socialism--Canada
Socialism--Canada--History.
Princeton subject headings:
Labor unions--Canada--Political activity--History.
Radicalism--Canada--History.
Socialism--Canada--History.