Thomas, Ronald R. <br/><br/>
Understanding telecommunications / 
Ronald R. Thomas. 
 - Blue Ridge Summit, PA :  TAB Books,  c1989. 
 - xii, 243 p. :  ill. 
<br/><br/> "A Petrocelli book." 
<br/><br/><label>ISBN: </label>0830692290 
<br/><br/><label>LCCN: </label>91026244     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication.