000 00324nam a2200133Ia 4500
008 190711s9999 xx 000 0 und d
020 _a9061919029
082 _a622.2 P 497
100 _aPETROSYAN, M.I
245 0 _aROCK BREAKAGE BY BLASTING
260 _aBROOKFIELD
_bBALKEMA
_c1994
300 _a25X16
942 _cBK
_2DDC
999 _c23531
_d23531