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| 0000077281-18-000070-index.html | 2018-08-03 15:16:21 | |
| 0000077281-18-000070.txt | 2018-08-03 15:16:21 | |
 0000077281-18-000070-xbrl.zip | 192653 | 2018-08-03 15:16:21 |
| a2018q210q06-30x18.htm | 1763938 | 2018-08-03 15:16:21 |
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| pei-20180630.xsd | 54472 | 2018-08-03 15:16:21 |
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| report.css | 2767 | 2018-08-03 15:16:21 |
| Show.js | 1410 | 2018-08-03 15:16:21 |