Helfrick, Albert D. <br/><br/>
Modern aviation electronics / 
Albert Helfrick. 
 - Englewood Cliffs, N. J. :  Prentice-Hall,  1984. 
 - 312 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronics in aeronautics.