Columbia subject headings:
Harvard subject headings:
Motion pictures--Political aspects--United States--History--20th century.
Popular fronts--History--20th century.
Spain--History--Civil War, 1936-1939--Motion pictures and the war.
Princeton subject headings:
Motion pictures--Political aspects.
Spain--History--Civil War, 1936-1939--Foreign public opinion, American.
Spain--History--Civil War, 1936-1939--Motion pictures and the war.