Allum, J. A. E. <br/><br/>
Photogeology and regional mapping. 

 - Oxford :  Pergamon Press,  [1969] 
<br/><br/> First ed. 1966. 
<br/><br/>Bibliography: p. 104. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aerial photography in geology.<br/>Geology -- Maps.--Geology -- Maps.<br/>Aerial photography.