Dungan, Frank R.,   1924- <br/><br/>
Electronic communications systems /  [Book]. 
Frank R. Dungan. 
 - Boston, Mass. :   Breton Publishers,   1987. 
 - xiv, 626 p. :   ill. ;   25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>053407698X 
<br/><br/><label>LCCN: </label>86018880 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.