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| 0000080172-15-000010-index.html | 2015-08-03 16:09:13 | |
| 0000080172-15-000010.txt | 2015-08-03 16:09:13 | |
| npk-20150731x8k.htm | 35613 | 2015-08-03 16:09:13 |
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