000 00386nam a2200145Ia 4500
008 190711s9999 xx 000 0 und d
020 _a8120403037
082 _a622.2 S617
100 _aSINGH,B
245 0 _aINTERNATIONAL SYMPOSIUM ON UNDERGROUND ENGINEERING PROCEEDINGS
250 _a2
260 _aNEW DELHI
_bOxford & IBH Publishing
_c1989
300 _a29X22
942 _cBK
_2DDC
999 _c22317
_d22317