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Seems to have been taken from
http://www.nps.gov/efmo/ . As a US government source, should be copyright-free. -- Brion
NRHP-listed or not? [ edit ]
I removed from the article claim "As a historic unit under the
National Park Service, the National Monument was administratively listed on the National Register of Historic Places on October 15, 1966." I believe that is incorrect, that this is not NRHP-listed. Perhaps there is one or more NRHP-listed site within the National Monument, but that would be different. doncram ( talk) 19:39, 19 June 2009 (UTC)
It is, in fact, listed:
http://npgallery.nps.gov/pdfhost/docs/NRHP/Text/66000109.pdf -- 184.108.40.206 ( talk) 06:53, 24 July 2016 (UTC)