000 00400nam a2200145Ia 4500
008 130223s9999 xx 000 0 und d
245 _aDesign and performance of large diameter wells in hard rock areas
260 _aRoorkee
260 _bNational Institute of Hydrology
260 _c1986
300 _a45 p.
440 _aTN-30; National Institute of H
901 _pS42448
942 _cB
_2udc
999 _c119740
_d119740