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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1354545
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www.interment.net/data/us/tx/walker/clapp.htm (9 Jan 2007)
Cemetery records of Clapp Cemetery in Walker County, Texas
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www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=1964057
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www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=2913