Dungan, Frank R.,  1924- <br/><br/>
Electronic communications systems / 
Frank R. Dungan 
 - Boston :  Breton Publishers,  1987 
 - xiv, 626 p. :  ill. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>053407698X 
<br/><br/><label>LCCN: </label>86-18880 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication