Electronic communication systems 
Kennedy, George, 1937- 
 - 4th ed. 
 -  Glencoe,  1993 
 - xv, 763 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-02-800592-9 (hard cover) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.
<br/><br/><label>Dewey Class. No.: </label>621.382 k38c 1993