Regis J Bates <br/><br/>
Voice and data communications handbook  English 
Regis J Bates 
 - New Delhi  Tata McGraw Hill  2000 
 - xxiv 998 p 
<br/><br/><label>ISBN: </label>9780072122763 
<br/><br/><label>Subjects--Personal Names: </label><br/>Donald W Gregory
<br/><br/><label>Dewey Class. No.: </label>006.454 BAT