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| 0000051644-18-000016-index.html | 2018-02-15 16:34:56 | |
| 0000051644-18-000016.txt | 2018-02-15 16:34:56 | |
| ipgq42017transcript8-k.htm | 20322 | 2018-02-15 16:34:56 |
| ipgq42017transcriptex991.htm | 374774 | 2018-02-15 16:34:56 |