000 00321nam a2200133Ia 4500
008 221123s9999 xx 000 0 und d
082 _a621.867.7:552.517 C27D
100 _aCGIP
245 0 _aDesign of gravel pack for tubewells
260 _bCGIP
_aNew Delhi
_c1967
300 _a9 p.
650 _aTubewells
942 _cR
999 _c6355
_d6355