Columbia subject headings:
Spain--History--Civil War, 1936-1939.
Spain--History--Errors, inventions, etc.
Harvard subject headings:
Spain--History--Civil War, 1936-1939.
Spain--History--Errors, inventions, etc.
Princeton subject headings:
Spain--History--Civil War, 1936-1939.
Spain--History--Errors, inventions, etc.