Columbia subject headings:
Europe--Politics and government--1918-1945.
Spain--History--Civil War, 1936-1939.
Harvard subject headings:
Europe--Politics and government--1918-1945.
Spain--History--Civil War, 1936-1939.
Princeton subject headings:
Europe--Politics and government--1918-1945.
Spain--History--Civil War, 1936-1939.