Columbia subject headings:
Anarchism--Spain--History--20th century.
Spain--History--Civil War, 1936-1939.
Spain--Politics and government--1931-1939.
Harvard subject headings:
Anarchists--Spain--History--20th century.
Confederación Nacional del Trabajo (Spain)--History.
Spain--History--Civil War, 1936-1939.
Spain--Politics and government--1931-1939.
Princeton subject headings:
Anarchists--Spain--History--20th century.
Confederación Nacional del Trabajo (Spain)--History.
Spain--History--Civil War, 1936-1939.
Spain--Politics and government--1991-1939.