Columbia subject headings:
Broadband communication systems--United States.
Mobile communication systems--United States.
Radio frequency allocation--United States.
Wireless communication systems--United States.
Harvard subject headings:
Broadband communication systems--United States.
Mobile communication systems--United States.
Radio frequency allocation--United States.
Wireless communication systems--United States
Princeton subject headings:
Broadband communication systems--United States.
Mobile communication systems--United States.
Radio frequency allocation--United States.
Wireless communication systems--United States.