Sources |
- [S4845] https://www.findagrave.com, Headstone, Duff, Allene Evans Conley and Carroll Dryden Duff, (https://www.findagrave.com/memorial/18363841/carroll-dryden-duff) (Reliability: 2).
- [S338] Ancestry.com, 1940 United States Federal Census, Clay City, Clay County, Illinois, (District 13-3) (Village), image 25, page 12b, (https://www.ancestry.com/interactive/2442/M-T0627-00769-00053?backurl=https%3a%2f%2fsearch.ancestry.com%2fsearch%2fdb.as) (Reliability: 3).
- [S208] Ancestry.com, 1920 United States Federal Census, Clay City, Clay County, Illinois, Enumeration District 3, Page 7B, (http://search.ancestry.com/content/viewer.aspx?dbid=6061&iid=4300174_00621&sid=&gskw=) (Reliability: 2).
- [S4843] Obituary, Duff, Carroll D, 97, none. (Reliability: 2).
- [S4846] https://www.findagrave.com, Obituary, Duff, Charles D, 65, (https://www.findagrave.com/memorial/17872864/charles-dryden-duff), none. (Reliability: 2).
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