000 00392nam a2200133Ia 4500
008 190711s9999 xx 000 0 und d
020 _a8120403045
082 _a622.2 S617
100 _aSINGH, B Edr.
245 0 _aPROCEEDINGS OF INTERNATIONAL SYMPOSIUM ON UNDERGROUND ENGINEERING VOL.2; 14-17 A
260 _aNEW DELHI
_bOxford & IBH Publishing
_c1989
300 _a94P.,
942 _cBK
_2DDC
999 _c22468
_d22468