Columbia subject headings:
Anarchism--Spain--Catalonia--History--20th century.
Confederación Nacional del Trabajo (Spain)
Confederación Nacional del Trabajo (Spain)--History.
Syndicalism--Spain--Catalonia--History--20th century.
Working class--Political activity--Spain--Catalonia--History.
Harvard subject headings:
Anarchism--Spain--Catalonia--History--20th century.
Confederación Nacional del Trabajo (Spain)--History.
Syndicalism--Spain--Catalonia--History--20th century.
Working class--Political activity--Spain--Catalonia--History.
Princeton subject headings:
Anarchism--Spain--Catalonia--History--20th century.
Confederación Nacional del Trabajo (Spain)--History--20th century.
Syndicalism--Spain--Catalonia--History--20th century.
Working class--Political activity--Spain--Catalonia--History--20th century.