Columbia subject headings:
Political parties--Spain--History--20th century.
Right and left (Political science)
Spain--Politics and government--1931-1939.
Harvard subject headings:
Political parties--Spain--History--20th century.
Right and left (Political science)
Spain--Politics and government--1931-1939.
Princeton subject headings:
Political parties--Spain--History.
Spain--History--Republic, 1931-1939.
Spain--Politics and government--1931-1939.