Columbia subject headings:
Socialism--United States.
United States--Economic conditions--1918-1945.
United States--Social conditions--1918-1932.
Harvard subject headings:
Socialism--United States
United States--Economic conditions--1918-1945.
United States--Social conditions.
Princeton subject headings:
Socialism--United States.
United States--Economic conditions--1918-1945.
United States--Social conditions.