"Numa Ridge Fire Lookout". List of Classified Structures. National Park Service. November 14, 2008. Archived from the original on May 21, 2011. Retrieved November 14, 2008.
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"Numa Ridge Fire Lookout". List of Classified Structures. National Park Service. November 14, 2008. Archived from the original on May 21, 2011. Retrieved November 14, 2008.