Columbia subject headings:
Harvard subject headings:
ETA (Organization)
Nationalism--Spain--País Vasco--History--20th century
País Vasco (Spain)--Politics and government--20th century.
Peace movements--Spain--País Vasco--History--20th century.
Terrorism--Spain--País Vasco--Prevention--Citizen participation.
Princeton subject headings:
Basta Ya! (Citizen group)
ETA (Organization)
Nationalism--Spain--País Vasco.
País Vasco (Spain)--Politics and government--20th century.
Terrorism--Spain--País Vasco.