00372nam a2200121 a 4500008004100000050001500041100002400056245005900080246001900139260006200158300002100220350000900241120416s1971    ||||||||||||||||| ||    u  aTN 291 Sym  aVan Rensberg, P.W.J10aPlanning open pit minescedited by P.W.J. Van Rensberg  aproceedings...  aCape TownbBelkema (AA) for the South African Instic1971  axxi, 388p. : ill  a0.00