Columbia subject headings:
Aeronautics--United States--Equipment and supplies--Periodicals.
Aeronautics--United States--Information services--Periodicals.
United States. National Aeronautics and Space Administration. Scientific and Technical Information Program--Communication systems--Periodicals.
Harvard subject headings:
Aeronautics--United States--Equipment and supplies--Periodicals.
Aeronautics--United States--Information services--Periodicals.
United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch--Communication systems--Periodicals.
Princeton subject headings: