Watson, Kenneth  1935- <br/><br/>
Photoclinometry from spacecraft images / 
by Kenneth Watson. 
 - Washington:   United States Government Printing Office,   1968.  
 - iii, B10 p. ;  29 cm. 
 -  599 Contributions to Astrogeology .
<br/><br/>Includes bibliographical references (p. B9-B10). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slopes (Physical geography)<br/>Astronautics in astronomy
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Moon--Surface
<br/><br/><label>Dewey Class. No.: </label>523.3