Heldman, Robert K <br/><br/>
Future telecommunications :  information applications, services, & infrastructure / 
Robert K. Heldman with contributions by T. F. Madison, T. A. Bystrzycki 
 - Washington :  McGraw-Hill,  1993       
 - xix, 234 p. 
<br/><br/><label>ISBN: </label>0070280398 
<br/><br/><label>LC Class. No.: </label>TK 5101 H474f 1993