Parent Directory| Name | Size | Last Modified |
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| 0000072207-13-000037-index.html | 2013-06-18 16:25:02 | |
| 0000072207-13-000037.txt | 2013-06-18 16:25:02 | |
| nbl201211kex231.htm | 2432 | 2013-06-18 16:25:02 |
| nbl_2012401kform11-k.htm | 337932 | 2013-06-18 16:25:02 |