Coates, R.F.W. <br/><br/>
Modern communication systems. 

 - 2nd ed 
 - London:  Macmillan Education ltd,  1975. 
 - xii,398p.:  ill;  23.5cm 
<br/><br/>Include bibliographical references and index 
<br/><br/><label>ISBN: </label>9780333358320 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Communication
<br/><br/><label>LC Class. No.: </label>SJMC TK5101.C56