00343nam a22001217a 4500020001800000082003100018100001900049245004600068260003600114300002600150526003700176650000800213  a81-204-0847-0  a624.15132bPetcL-37, P-19  aPetrosyan M.I.  aRock Breakage by blastingcPetrosyan M.I.  anew delhibraju primianicc1991  avi, p 141bill.c18cm  a0b0c0d624_151320000000000_PET  aMCE