The ARRL general class license manual for radio amateurs :  everything you need to pass your general class written exam / 
ARRL edited by Larry D. Wolfgang WR18 
 - Newington :  ARRL  c2001 
 - viii, 380 p. :  ill. ;  24 cm  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication 
<br/><br/><label>Dewey Class. No.: </label>384.54