Vignault, Walter L. <br/><br/>
Worldwide telecommunications guide for the business manager / 
Walter L. Vignault 
 - New York :  John Wiley & sons,  1987 
 - 417 p. :  illus 
<br/><br/><label>ISBN: </label>0471858285 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--communication systems.<br/>Telecommunication System.<br/>Telephnone In Business.
<br/><br/><label>Dewey Class. No.: </label>384  / V681W