Dulin, John J.,  1921- <br/><br/>
Electronic communications / 
John J. Dulin, Victor F. Veley, John I. Gilbert 
 - Blue Ridge Summit, Pa. :  TAB Books,  1991 
 - 690 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0830633650 
<br/><br/><label>LCCN: </label>90-043890 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication