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| 0000051644-19-000005.txt | 2019-02-19 16:50:59 | |
| ipgq42018transcript8-k.htm | 20204 | 2019-02-19 16:50:59 |
| ipgq42018transcriptex991.htm | 586622 | 2019-02-19 16:50:59 |