Columbia subject headings:
Collective labor agreements--United States.
Industrial relations--United States.
Labor laws and legislation--United States.
Harvard subject headings:
Collective bargaining--Law and legislation--United States.
Collective bargaining--United States.
Industrial relations--United States
Labor laws and legislation--United States
Princeton subject headings:
Collective labor agreements--United States.
Industrial relations--United States.
Labor laws and legislation--United States.