The teleconferencing handbook :  a guide to cost-effective communication / 
by Ellen A. Lazer ... [et al.] 
 - White Plains, N.Y. :  Knowledge Industry,  1983 
 - 219 p. :  ill. 
 - Communications library series .
<br/><br/>Bibliography Includes index 
<br/><br/><label>ISBN: </label>0867290226 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TELECONFERENCING
<br/><br/><label>LC Class. No.: </label>TK5102.5  / T443