Encyclopedia of telecommunications / 
edited by Robert A. Meyers 
 - San Diego :  Academic Press,  c1989 
 - xi, 575 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0122266919 :  USD 49.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication--Encyclopedias
<br/><br/><label>Dewey Class. No.: </label>621.3803