Parent Directory| Name | Size | Last Modified |
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| 0000072207-20-000052-index.html | 2020-06-11 16:46:08 | |
| 0000072207-20-000052.txt | 2020-06-11 16:46:08 | |
| nbl_2019401kxform11-k.htm | 324394 | 2020-06-11 16:46:08 |
| nbl_2019x11-kxex231.htm | 2738 | 2020-06-11 16:46:08 |