Kilford, W. K. <br/><br/>
Elementary air survey / 
W. K. Kilford. 
 - 2nd ed. 
 - London :  Pitman Pub.,  1970 
 - 316 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0273427385 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aerial photogrammetry