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| 0000077159-20-000058-index.html | 2020-11-06 10:38:00 | |
| 0000077159-20-000058.txt | 2020-11-06 10:38:00 | |
 0000077159-20-000058-xbrl.zip | 551431 | 2020-11-06 10:38:00 |
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| pva-20200930xex311.htm | 9222 | 2020-11-06 10:38:00 |
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| pva-20200930xex321.htm | 5182 | 2020-11-06 10:38:00 |
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| report.css | 2767 | 2020-11-06 10:38:00 |
| Show.js | 1085 | 2020-11-06 10:38:00 |