Columbia subject headings:
Harvard subject headings:
Aeronautics, Commercial--Law and legislation--United States
Air pilots--Legal status, laws, etc.--United States.
Airlines--United States
Collective bargaining--Aeronautics--United States.
Labor laws and legislation--United States
Princeton subject headings:
Aeronautics, Commercial--Law and legislation--United States.
Air pilots--Legal status, laws, etc.--United States.
Airlines--United States.
Collective bargaining--Aeronautics--United States.
Labor laws and legislation--United States.