Columbia subject headings:
Communism--Spain--History--20th century--Public opinion.
Spain--History--Civil War, 1936-1939--Social aspects.
Harvard subject headings:
Communists--Spain--History--20th century.
Spain--History--Civil War, 1936-1939--Psychological aspects.
Spain--History--Civil War, 1936-1939--Social aspects.
Princeton subject headings: