BLYTH, W. John. <br/><br/>
Telecomunicatios : Concepts , Development, and Management. 

 - 2 nd 
 - New York .  Glancoe / McgGraw - Hill  1990 
 - xx, 362 P 
<br/><br/><label>ISBN: </label>0-02-680841-2 
<br/><br/><label>Dewey Class. No.: </label>384