000 00316nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a622.12 B7949
100 _aBRAWNER,C.O
245 0 _aSTABILITY IN OPEN PIT MINING
260 _aNEW YORK
_bSOCIETY OF MINING ENGINEERS
_c1971
300 _a24X16
942 _cBK
_2DDC
999 _c22059
_d22059