Columbia subject headings:
Confederación Nacional del Trabajo (Spain)--History.
Labor unions--Spain--History.
Spain--Politics and government--1939-1975.
Harvard subject headings:
Confederación Nacional del Trabajo (Spain)--History.
Labor unions--Spain--History
Spain--Politics and government--1939-1975.
Princeton subject headings:
Confederación Nacional del Trabajo (Spain)--History--20th century.