Electronic communications - Roddy, Dennis, 1931- 4 0 16; Coolen, John; 5 (Rizal, Philippines : JEMMA, 1984)
Includes index.;Reprint. Originally published : Reston, VA :Reston Publishing, ©1984.
Keywords: 2 -- 0; 6; Telecommunication. -- 20; 20; 2