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| 0000072909-20-000016.txt | 2020-10-29 13:52:43 | |
 0000072909-20-000016-xbrl.zip | 215203 | 2020-10-29 13:52:43 |
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| nspwex3201q32020.htm | 11507 | 2020-10-29 13:52:43 |
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| report.css | 2767 | 2020-10-29 13:52:43 |
| Show.js | 1085 | 2020-10-29 13:52:43 |