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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:462068
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www.interment.net/data/us/ia/jasper/sugar_grove.htm (13 Feb 2006)
Cemetery records of Sugar Grove Cemetery in Jasper County, Iowa
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www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=96442
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www.usgennet.org/usa/ia/county/jasper1/metz/cemetery/ (24 Apr 2007)