Columbia subject headings:
Artificial satellites in telecommunication--United States--Periodicals.
Radio--Periodicals.
Telecommunication--United States--Periodicals.
Harvard subject headings:
Artificial satellites in telecommunication--United States--Periodicals.
Radio--Periodicals
Telecommunication--United States--Periodicals
Princeton subject headings:
Communication and traffic--United States.
United States. Federal Communications Commission--Periodicals.