Columbia subject headings:
Acción Nacionalista Vasca (Spain)--History--20th century.
Elections--Spain--País Vasco--History--20th century.
País Vasco (Spain)--History--Autonomy and independence movements--20th century.
Political parties--Spain--País Vasco--History--20th century.
Harvard subject headings:
Acción Nacionalista Vasca (Spain)--History--20th century.
Elections--Spain--País Vasco--History--20th century.
País Vasco (Spain)--History--20th century.
País Vasco (Spain)--History--Autonomy and independence movements.
Political parties--Spain--País Vasco--History--20th century.
Princeton subject headings:
Acción Nacionalista Vasca (Spain)--History.
País Vasco (Spain)--History--Autonomy and indepencence movements.
País Vasco (Spain)--Politics and government--20th century.