Roddy, Dennis,  1931- <br/><br/>
Electronic communications / 
Dennis Roddy & John Coolen. 
 - 4th ed. 
 - New Delhi :  Pearson,   c2008. 
 - xi, 723 p. :  ill. ;  24 cm. 
<br/><br/>Includes appendices & index. 
<br/><br/><label>ISBN: </label>9788177585582 (pbk.) 
<br/><br/><label>LCCN: </label>94014041  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic communication.<br/>Telecommunication.
<br/><br/><label>LC Class. No.: </label>TK5101  / .R56 1995 
<br/><br/><label>Dewey Class. No.: </label>621.382  / ROD