Heldman, Robert K. <br/><br/>
Telecommunications management planning :  ISDN networks, products, and services / 
Robert K. Heldman. 
 - Blue Ridge Summit, PA :  TAB Professional and Reference Books,  c1987. 
 - xviii, 734 p. :  ill. 
<br/><br/><label>ISBN: </label>0830628649 :  $39.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management--Communication systems--Planning.<br/>Business enterprises--Communication systems--Planning.<br/>Management information systems--Planning.<br/>Telecommunication systems.<br/>Telemarketing.
<br/><br/><label>LC Class. No.: </label>HD30.335  / .H45 1987 
<br/><br/><label>Dewey Class. No.: </label>658.4/038�19