Columbia subject headings:
Labor laws and legislation--United States.
Labor unions--United States.
Unemployment insurance--United States.
Unemployment--United States.
United States--Economic conditions--1918-1945.
Harvard subject headings:
Labor laws and legislation--United States
Labor unions--United States
Unemployed--United States
Unemployment insurance--United States.
United States--Economic conditions--1918-1945.
Princeton subject headings:
Labor laws and legislation--United States.
Labor unions--United States.
Unemployed--United States.
Unemployment insurance--United States.
United States--Economic conditions--1918-1945.