Electronic communications /

Roddy, Dennis, 1931-

Electronic communications / Dennis Roddy, John Coolen. - 4th ed. - Englewood Cliffs, NJ ; New Delhi : Pearson/Prentice Hall , c2008. - ix, 820 p. : ill. ; 26 cm.

Includes index.

8131705110 013312083X

94014041

621.382