Columbia subject headings:
Harvard subject headings:
ETA (Organization)
País Vasco (Spain)--Politics and government--21st century.
País Vasco (Spain)--History--Autonomy and independence movements.
País Vasco (Spain)--Politics and government--20th century.
Princeton subject headings:
ETA (Organization)
País Vasco (Spain)--History--Autonomy and independence movements.
País Vasco (Spain)--Politics and government--20th century.
País Vasco (Spain)--Politics and government--21st century.