Planning open pit mines :  proceedings of the Symposium on the Theoretical Background to the Planning of Open Pit Mines with Special Reference to Slope Stability, Johannesburg, Republic of South Africa, 29 August - 4 September 1970 / 
edited by P. W. J. Van Rensburg. 
 - Cape Town :  South African Institute of Mining and Metallurgy,  1970. 
 - xvi, 388 pages :  illustrations, maps. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Strip mining--Congresses.
<br/><br/><label>Dewey Class. No.: </label>622.292