Van Rensberg, P.W.J <br/><br/>
Planning open pit mines 
 proceedings... 
edited by P.W.J. Van Rensberg 
 - Cape Town  Belkema (AA) for the South African Insti  1971 
 - xxi, 388p. : ill 
<br/><br/><label>LC Class. No.: </label>TN 291 Sym