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| 0001193125-11-104887-index.html | 2011-04-21 12:57:23 | |
| 0001193125-11-104887.txt | 2011-04-21 12:57:23 | |
 0001193125-11-104887-xbrl.zip | 147147 | 2011-04-21 12:57:23 |
| d10q.htm | 725127 | 2011-04-21 12:57:23 |
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| dex31a.htm | 6224 | 2011-04-21 12:57:23 |
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| dex32.htm | 7976 | 2011-04-21 12:57:23 |
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| R32.xml | 11990 | 2011-04-21 12:57:23 |
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| R9.xml | 19940 | 2011-04-21 12:57:23 |
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| unp-20110331_lab.xml | 478066 | 2011-04-21 12:57:23 |
| unp-20110331_pre.xml | 459914 | 2011-04-21 12:57:23 |