Helfrick, Albert D. <br/><br/>
Amateur radio equipment fundamentals / 
Alfred D. Helfrick. 
 - Englewood Cliffs, NJ :  Prentice-Hall,  c1982. 
 - xii, 284 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio--Apparatus and supplies--Design and construction--Amateurs' manuals.<br/>Amateur radio stations.
<br/><br/><label>Dewey Class. No.: </label>621.38413