Columbia subject headings:
Depressions--1929.
Economic history--1918-1945.
World politics--1919-1932.
Harvard subject headings:
Depressions--1929
Economic history--1918-1945
World politics--1919-1932
Princeton subject headings:
Depressions--1929.
Economic history--1918-1945.
World politics--1919-1932.