Frenzel, Louis E. <br/><br/>
Communication electronics 
Louis E. Frenzel. 
 - 4th.ed 
 - New York   Glencoe  c2001. 
 - xxxiv, 434 p. :  ill.  24 cm. 
<br/><br/>Include bibliographical references and indexs 
<br/><br/><label>ISBN: </label>9780071183048 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.<br/>Data transmission systems.