Columbia subject headings:
Harvard subject headings:
Guernica (Spain)--History--Bombardment, 1937--Anniversaries, etc.--Congresses.
Nationalism--Spain--Congresses.
Spain--History--Autonomy and independence movements--Congresses.
Spain--History--Civil War, 1936-1939--Congresses.
Spain--Politics and government--20th century--Congresses.
Princeton subject headings:
Guernica (Spain)--History--Bombardment, 1937--Anniversaries, etc.--Congresses.
Nationalism--Spain--Congresses.
País Vasco (Spain)--Politics and government--20th century--Congresses.
Spain--History--Civil War, 1936-1939--Congresses.
Spain--Politics and government--20th century--Congresses.