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| 0000072020-11-000004-index.html | 2011-02-23 08:20:29 | |
| 0000072020-11-000004.txt | 2011-02-23 08:20:29 | |
| nicorincearningrelease123110.htm | 433530 | 2011-02-23 08:20:29 |
| nicorincform8-k022311.htm | 31695 | 2011-02-23 08:20:29 |
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