Columbia subject headings:
Nationalism--Spain--País Vasco.
País Vasco (Spain)--History--20th century.
Spain--History--Civil War, 1936-1939.
Harvard subject headings:
País Vasco (Spain)--History--20th century.
Spain--History--Civil War, 1936-1939.
Princeton subject headings:
Nationalism--Spain--País Vasco.
País Vasco (Spain)--History--20th century.
Spain--History--Civil War, 1936-1939.