Roddy, Dennis <br/><br/>
Electronic communications 

 - 4th 
 - New jersey  Reston publishing  1995 
 - ix, 820 p.  25 cm 
<br/><br/><label>ISBN: </label>8120309847 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunications
<br/><br/><label>Dewey Class. No.: </label>621.38  / ROD 
<br/><br/><label>Universal Decimal Class. No.: </label> / ROD