Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany--History--20th century.
Germany--Politics and government--1933-1945.
Maass, Hermann, 1897-1944.
Politicians--Germany--Biography
Socialism--Germany--History--20th century
Sozialdemokratische Partei Deutschlands--History.
Princeton subject headings:
Anti-Nazi movement--Germany--History--20th century.
Germany--Politics and government--1933-1945.
Maass, Hermann, 1897-1944.
Politicians--Germany--Biography.
Socialism--Germany--History--20th century.
Sozialdemokratische Partei Deutschlands--History.