Gehris, Dennis O. <br/><br/>
Communication technologies / 
Dennis O. Gehris, Linda F. Szul 
 - Upper Saddle River, NJ :  Prentice Hall,  2002 
 - xvii, 267 p. ;  25 cm. 
<br/><br/> Includes glossary and index 
<br/><br/><label>ISBN: </label>0130400246 9780130400246 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information technology<br/>Telecommunication