Hearley, M. J. <br/><br/>
Air navigation :  some problems and their solution / 
by M. J. Hearley 
 - London :  Longmans Green,  1942 
 - iv, 92 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation<br/>Electronics in navigation
<br/><br/><label>Dewey Class. No.: </label>629.045