Columbia subject headings:
Collective bargaining--United States.
International Labour Organisation.
Labor laws and legislation--United States.
Labor unions--Law and legislation--United States.
Harvard subject headings:
Collective bargaining--United States.
Collective labor agreements--United States.
Collective labor agreements.
Freedom of association--United States
Freedom of association.
International Labour Organisation
Labor laws and legislation--United States
Labor unions--Law and legislation
Labor unions--Law and legislation--United States
Princeton subject headings:
Collective labor agreements--United States.
Collective labor agreements.
Freedom of association--United States.
Freedom of association.
Labor unions--Law and legislation--United States.
Labor unions--Law and legislation.