Columbia subject headings:
P.S.O.E. (Political party)--History.
Socialism--Spain--Almería--History.
Harvard subject headings:
P.S.O.E. (Political party)--History.
Socialism--Spain--Almería--History.
Princeton subject headings:
P.S.O.E. (Political party)--History.
Socialism--Spain--Almería--History.