United States Government
edit- http://memory.loc.gov/ammem/ammemhome.html
- http://www.archives.gov/research_room/research_topics/american_west/american_west.html
- http://www.cr.nps.gov/history/online_books/steamtown/shst.htm
- http://memory.loc.gov/ammem/today/may10.html
- http://coastal.er.usgs.gov/navassa/history/mining1.html
- http://memory.loc.gov/ammem/gmdhtml/rrhtml/rrintro.html
- http://users.rcn.com/brill/freudarc.html
- http://www.hoover.archives.gov/exhibits/Hooverstory/gallery02/gallery02.html
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