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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:471080
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www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=2319953 (20 Dec 2009)
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en.wikipedia.org/wiki/Clayton,_Kansas (13 Jun 2010)
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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:2393549