Master Frequency File

This one-of-a-kind reference will unlock a world of listening possibilities. Contains the largest, most accurate source of services, frequencies, call signs and user IDs on the 25 MHz to 2110 MHz radio spectrum. Makes it easy for radio professionals and hobbyists alike to tune in and listen to the confidential communications of the FBI, Secret Service, National Parks, Forest Service, Drug Enforcement Administration, and other agencies.Tunnell, James E. is the author of 'Master Frequency File', published 1993 under ISBN 9780830641321 and ISBN 0830641327.