Columbia subject headings:
Labor unions--Political activity--Spain--History--20th century.
Political participation--Spain--History--20th century.
Representative government and representation--Spain--History--20th century.
Spain--Politics and government--1939-1975.
Harvard subject headings:
Labor unions--Spain--Political activity--History--20th century.
Political participation--Spain--History--20th century.
Representative government and representation--Spain--History--20th century.
Spain--Politics and government--1939-1975.
Princeton subject headings:
Labor unions--Spain--Political activity--History--20th century.
Political participation--Spain--History--20th century.
Representative government and representation--Spain--History--20th century.
Spain--Politics and government--1939-1975.