Kilford, W.K. <br/><br/>
Elementary Air Survey. 

 - 4th, ed. 
 - London :  ELBS &Pitman,  1980. 
 - xii,345 p. 
<br/><br/><label>ISBN: </label>027301082 
<br/><br/><label>Dewey Class. No.: </label>526.98  / KIL