Columbia subject headings:
Germany--Politics and government--1918-1933.
Sozialdemokratische Partei Deutschlands--Platforms--History--20th century.
Harvard subject headings:
Germany--Politics and government--1918-1933
Sozialdemokratische Partei Deutschlands--Platforms--History--20th century.
Princeton subject headings:
Brüning, Heinrich, 1885-1970.
Germany--Politics and government--1918-1933.
Sozialdemokratische Partei Deutschlands--History.
Working class--Germany--Political activity--History.