Columbia subject headings:
Francoism.
Labor unions--Spain--León (Province)--History--20th century.
Spain--Politics and government--1939-1975.
Syndicalism--Spain--León (Province)--History--20th century.
Harvard subject headings:
Francoism.
Labor unions--Spain--León (Province)--History--20th century.
Spain--Politics and government--1939-1975.
Syndicalism--Spain--León (Province)--History--20th century.
Princeton subject headings: