Amazon.com:Books: Marshall Brain's
How Stuff Works
by Marshall Brain (Arthur) Tom Farley. Basic Wireless Principles: How it works. http://inventors.about.com/library/inventors/blcell.htm
History of Cellular and Mobile Phones-PCS-Digital Cell Phones. "How the FCC slowed the progress of a cellular phone system", http://inventors.about.com/library/inventors/blcell.htm
Forrest M. Mines, III. Science and Communication Circuits and Projects . "Sound". Radio Shack. 2000.
Amazon.com: Books: Janice VanCleave's Physics for Every Kid by Janice101 Easy Experiments in Motion, Heat, Light, Machines, and Sounds. March, 1991.
Barnes & Noble.com: Books: "The Way Things Work Kit" by David Macaulay, Neil Ardley.
The Cell Phone Handbook: Everything You Wanted To Know About Wireless Telphony But Didn't Know What To Ask.
By Penelope Stez, June, 1999.