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Baris 115: * [http://www.nps.gov/history/archeology/BestIdea/index.htm ''The National Parks: America's Best Idea''] from the [http://www.nps.gov/history/archeology National Park Service Archeology Program] * [http://www.archives.gov/research/arc/topics/national-parks/ National Park Service Records] available in the [http://www.archives.gov/research/arc/ Archival Research Catalog] of the [[National Archives and Records Administration]] * [http://www.ourarchives.wikispaces.net/National+Park+Service+Records+at+the+National+Archives+at+Atlanta National Park Service Records available at the National Archives and Records Administration's Atlanta facility] {{Webarchive\|url=https://archive.istoday/20130222102930/http://www.ourarchives.wikispaces.net/National+Park+Service+Records+at+the+National+Archives+at+Atlanta \|date=2013-02-22 }} '''Sumber lain'''

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