Columbia subject headings:
Labor unions--Political activity--England--Yorkshire--History.
Liberalism--England--Yorkshire--History.
Socialism--England--Yorkshire--History.
Working class--Political activity--England--Yorkshire--History.
Harvard subject headings:
Labor unions--England--Yorkshire--Political activity--History.
Labor unions--Political activity--England--Yorkshire.
Labour Party (Great Britain)
Liberalism--England--Yorkshire--History.
Socialism--England--Yorkshire--History.
Socialism--England--Yorkshire.
Working class--England--Yorkshire--Political activity--History.
Working class--Political activity--England--Yorkshire.
Princeton subject headings:
Labor unions--England--Yorkshire--Political activity--History.
Liberalism--England--Yorkshire--History.
Socialism--England--Yorkshire--History.
Working class--England--Yorkshire--Political activity--History.