Horak, Ray. <br/><br/>
Communications systems and networks  
Ray Horak. 
 - 3rd ed. 
 - Indianapolis, IN :  Wiley Pub.,  c2002. 
 - xlii, 678 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0764548999 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems.<br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>621.382