Electronic communications /
Roddy, Dennis.
Electronic communications / Dennis Roddy, John Coolen. - 3rd ed. - Reston, Virginia : Reston Publishing Co., 1984. - 788 p. ; 24 cm.
Includes index.
0835915980
Telecommunication.
Electronic communications / Dennis Roddy, John Coolen. - 3rd ed. - Reston, Virginia : Reston Publishing Co., 1984. - 788 p. ; 24 cm.
Includes index.
0835915980
Telecommunication.
