Columbia subject headings:
Capitalism.
Economic history--1918-1945.
Socialism.
World politics--1919-1932.
Harvard subject headings:
Capitalism.
Economic history--1918-1945
Germany--Economic conditions--1918-1945.
Germany--Politics and government--20th century
Socialism--Germany--History
Socialism.
World politics--1919-1932
Princeton subject headings:
Political science.
Socialism.