000 003020000a22001210004500
008 151112t1980 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a622.276
_bA4
942 _cBK
100 _aAguilera, Roberto
245 _aNaturally fractured reservoirs
260 _aTulsa
_bPenn Well Bks.
_c1980
999 _c140929
_d140929