Columbia subject headings:
ETA (Organization)--History.
Nationalism--Spain--País Vasco--History--20th century.
País Vasco (Spain)--Social conditions.
Harvard subject headings:
ETA (Organization)--History.
Nationalism--Spain--País Vasco
País Vasco (Spain)--Social conditions.
País Vasco (Spain)--History--Autonomy and independence movements
Princeton subject headings: