Boucher, James R. <br/><br/>
Voice teletraffic systems engineering.   
by James R. Boucher. 
 - Norwood  Artech House  1988 
 - xiv, 165p 
<br/><br/><label>ISBN: </label>0890063354 
<br/><br/><label>Dewey Class. No.: </label>621.38  / N886