Columbia subject headings:
Aeronautics--United States--Accidents--Human factors.
Aeronautics--United States--Accidents.
Aeronautics--United States--Safety measures.
Airlines--Deregulation--United States.
Airlines--Safety regulations--United States.
Harvard subject headings:
Aeronautics--United States--Safety measures
Airlines--Deregulation--United States
Airlines--Deregulation--United States.
Airlines--Safety regulations--United States.
Airlines--United States--Safety regulations.
Princeton subject headings: