Columbia subject headings:
Cost and standard of living--United States.
Industrial relations--United States.
Labor unions--United States.
Wages--United States.
Harvard subject headings:
Cost and standard of living--United States.
Industrial relations--United States
Labor unions--United States
Wages--United States.
Princeton subject headings:
Cost and standard of living--United States.
Industrial relations--United States.
Labor unions--United States.
Wages--United States.