Bates, Regis J.  <br/><br/>
Principles of voice and data communications 
Regis J. Bates 
 - New York  McGraw-Hill  2007 
 - xxviii, 782p. 
<br/><br/><label>ISBN: </label>9780071257671 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Voice output communication<br/>Telecommunication
<br/><br/><label>Dewey Class. No.: </label>004.6 B319p