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This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 18:32, 11 February 2008 |  | 2,000 × 608 (147 KB) | Epolk | {{Information |Description=Map of the Pennsylvania Railroad Altoona Works |Source=http://www.nps.gov/history/history/online_books/railroad/shsm.htm |Date=Feburary 1989 |Author=National Park Service |Permission=Public Domain - work of the United States Nat |
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