Columbia subject headings:
Nationalism--Spain--País Vasco.
País Vasco (Spain)--Politics and government--20th century.
Harvard subject headings:
Nationalism--Spain--País Vasco
Nationalism--Spain--País Vasco--History
País Vasco (Spain)--Politics and government--20th century.
Princeton subject headings:
Nationalism--Spain--País Vasco.
País Vasco (Spain)--Politics and government--20th century.