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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:462583
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www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=96573
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iagenweb.org/audubon/cemeteries/violacem/index.htm (10 Apr 2013)
Audubon County Iowa Viola Township Cemetery
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iowagravestones.org/cemetery_list.php?CID=5&cName=Viola Township a.k.a. Viola Center (2 May 2013)