000 00335nam a2200133Ia 4500
008 190719s9999 xx 000 0 und d
020 _a81-204-0847-0
082 _a622.2 P497
100 _aPETROSYAN,M.I
245 0 _aROCK BREAKAGE BY BLASTING
260 _aBROOKFIELD
_bBALKEMA
_c1994
300 _a141p.,25X16Cms.
942 _cBK
_2DDC
999 _c44695
_d44695