000 00379nam a2200121Ia 4500
999 _c10424
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082 _a621.952 J54
100 _aJENNINGS,W.M
_974017
245 0 _aPERCUSSION DRILLING RIGS AND TOOLS FOR SHALLOW WATER WELLS
260 _aLONDON
_bTECHNICAL PRESS
_c1934
856 _uhttp://idr.l2.nitk.ac.in/jspui/handle/123456789/18136
942 _cBK