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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1215580
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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1168078
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www.usgwarchives.org/pa/somerset/cemeteries/jenner.htm (20 Jul 2010)
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en.wikipedia.org/wiki/Addison,_Pennsylvania (24 Aug 2010)