Columbia subject headings:
Spain--Politics and government--1875-1885.
Spain--Politics and government--1886-1993.
Harvard subject headings:
Spain--Politics and government--1875-1885.
Spain--Politics and government--1886-1931.
Spain--Politics and government--1886-1993.
Princeton subject headings:
Spain--Politics and government--1875-1885.
Spain--Politics and government--1886-1993.