000 003140000a22001210004500
245 _aApplication of directional blasting in mining and civil engineering
100 _aChernigovski, A.A.
250 _a2d ed.
260 _aRotterdam
_bA.A. Balkema
_c1986
080 _a622.235
_bC5
041 _aEN
942 _cBK
999 _c120508
_d120508