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| 245 | 0 | 0 | _aSliding-sleeve fracs unlock more ND Bakken oil |
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_a _b _c6 jun. 2011 |
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| 270 | _a13/07/2011 ; 13/07/2011 | ||
| 300 | _a4 p. ; 34;36-38 | ||
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_tOil & Gas Journal _g109 |
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_aDittrick, Paula _919036 |
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