TY  - BOOK
AU  - Roddy, Dennis,
AU  - Coolen, John,
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 971-8636-32-3 (newsprint)
SN  - 2
PY  - 1984///];copyright 198446
CY  - Rizal, Philippines
PB  - JEMMA
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Telecommunication
N1  - Includes index.;Reprint. Originally published : Reston, VA :Reston Publishing, ©1984; 5
ER  -