- [S00121] 1860 United States Federal Census, Images reproduced by FamilySearch, (Ancestry.com Operations, Inc., 2009), [database online].
Ancestry.com. 1860 United States Federal Census [database online]. Provo, Utah: MyFamily.com, Inc., 2004. Original data: United States. 1860 United States Federal Census. M653, 1438 rolls. National Archives and Records Administration, Washington D.C. Otsego, Otsego, New York, post office Cooperstown, roll M653_841, page 0, image 606.
- [S00025] Descendants of Matthys Cornelisen, Ronald M. Denes, (http://familytreemaker.genealogy.com/users/d/e/n/Ronald--M-Denes/GENE17-0001.html), document online.