Columbia subject headings:
P.S.O.E. (Political party)
Socialism--Spain.
Spain--Politics and government--1975-1982.
Harvard subject headings:
P.S.O.E. (Political party)
Socialism--Spain
Spain--Politics and government--1975-1982.
Princeton subject headings:
P.S.O.E. (Political party)
Socialism--Spain.
Spain--Politics and government--1975-.