Columbia subject headings:
Socialism--Spain--History--20th century.
Spain--Politics and government--1939-1975.
Spain--Politics and government--1975-1982.
Harvard subject headings:
Democratization--Spain--History--20th century.
Spain--Politics and government--1975-1982.
Princeton subject headings:
Democratization--Spain--History--20th century.
Spain--Politics and government--1975-.