Columbia subject headings:
United States--Economic conditions--1918-1945.
United States--History--1919-1933.
United States--Social conditions.
Harvard subject headings:
United States--Economic conditions--1918-1945.
United States--History--1919-1933.
United States--Social conditions.
Princeton subject headings:
United States--Economic conditions--1918-1945.
United States--Economic conditions--1945-
United States--History--1919-1933.
United States--Social conditions.