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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:428617
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www.pikecoilgenweb.org/index.php?action=displaycat&catid=3 (11 Aug 2010)
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www.pikecoilgenweb.org/index.php?action=displaycat&catid=12 (12 Aug 2010)
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en.wikipedia.org/wiki/Atlas_Township,_Pike_County,_Illinois (14 May 2010)