Horak, Ray. <br/><br/>
Communications systems and networks / 
By Ray Horak. 
 - 3rd ed. 
 - New Delhi :  Wiley Publishing Inc. ,  2002. 
 - xxxii,678p, ;  PB  24 cm. 
<br/><br/><label>ISBN: </label>812650336X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fundamentals of transmission systems<br/>Messaging systems:facsimile voice processing and electronic mail<br/>Conventional digital and data networks
<br/><br/><label>Dewey Class. No.: </label>004.65   / HORR