Columbia subject headings:
Communism--Spain--History.
Confederación Nacional del Trabajo (Spain)--History.
Consejo Revolucionario de Aragón--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.
Harvard subject headings:
Communism--Spain--History
Confederación Nacional del Trabajo (Spain)--History.
Consejo Revolucionario de Aragón--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.
Princeton subject headings:
Communism--Spain--History.
Confederación Nacional del Trabajo (Spain)--History.
Consejo Revolucionario de Aragón--History.
Spain--History--Civil War, 1936-1939.
Syndicalism--Spain--History.