Columbia subject headings:
Aeronautics, Commercial--United States--Exhibitions.
Aircraft industry--United States--Exhibitions.
Airlines--United States--Exhibitions.
National Air and Space Museum--Exhibitions.
Harvard subject headings:
Aeronautics, Commercial--United States--Exhibitions.
Aircraft industry--United States--Exhibitions.
Airlines--United States--Exhibitions.
National Air and Space Museum--Exhibitions.
Princeton subject headings: