Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--Spain.
P.S.O.E. (Political party)--History.
Sozialdemokratische Partei Deutschlands--History--20th century.
Spain--Foreign relations--Germany.
Princeton subject headings:
Democratization--Spain--History--20th century.
Germany--Politics and government--20th century.
P.S.O.E. (Political party)--History.
Political parties--Germany--History--20th century.
Political parties--Spain--History--20th century.
Sozialdemokratische Partei Deutschlands--History.
Spain--Politics and government--20th century.