Teleconferencing <br/><br/>
Teleconferencing  Sate of the art report 

 - Pergamon infotech limited, England  1985 
 - ix,139 
<br/><br/><label>ISBN: </label>0-08-028-597X 
<br/><br/><label>Dewey Class. No.: </label>658.5036 Tel