Columbia subject headings:
Catholic labor unions--Spain--Catalonia--History--20th century.
Labor unions and fascism--Spain--Catalonia--History--20th century.
Spain--History--20th century.
Syndicalism--Spain--Catalonia--History--20th century.
Harvard subject headings:
Catholic labor unions--Spain--Catalonia--History--20th century.
Labor unions and fascism--Spain--Catalonia--History--20th century.
Spain--History--20th century.
Syndicalism--Spain--Catalonia--History--20th century.
Princeton subject headings:
Catholic labor unions--Spain--Catalonia--History--20th century.
Labor unions and fascism--Spain--Catalonia--History--20th century.
Spain--History--20th century.
Syndicalism--Spain--Catalonia--History--20th century.