Columbia subject headings:
Harvard subject headings:
Populism--Spain--History--20th century.
Populism--Spain--History.
Regionalism--Spain--History.
Social movements--Spain--History.
Socialism--Spain
Spain--Politics and government--1886-1931.
Spain--Social conditions--1886-1939.
Princeton subject headings:
Populism--Spain--History.
Spain--Politics and government--1886-1931.
Spain--Social conditions--1886-1939.