Henkes, William C. <br/><br/>
Satellite monitoring of open pit mining operations / 
by William C. Henkes 
 - Washington, D.C. :  U.S. Government Printing Office,  1971 
 - 28 p. ;  26 cm. 
 - Information circurlar ;  8530 .
<br/><br/> Bureau of mines 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Artificial Satellite<br/>Lunar geology<br/>Lunar petrology
<br/><br/><label>Dewey Class. No.: </label>523.391