Columbia subject headings:
Germany (West)--Politics and government--Sources.
Political parties--Germany (West)--History--Sources.
Sozialdemokratische Partei Deutschlands--History--Sources.
Harvard subject headings:
Ollenhauer, Erich, 1901-1963.
Schumacher, Kurt, 1895-1952.
Sozialdemokratische Partei Deutschlands--History.
Princeton subject headings:
Germany--Politics and government--1945-1990--Sources.
Sozialdemokratische Partei Deutschlands--History--Sources.