| Kilder |
- [S241] Folketelling USA 01.04.1940, Folkräkningsplats: Christiana, Dane, Wisconsin; Rulle: m-t0627-04468; Sida: 13A; Räkningsdistrikt:: 13-14 (Troverdighet: 3).
- [S238] Find a grave, (USA), Memorial page for Donald Clair Berge (29 Feb 1928–17 May 2004), Find a Grave Memorial ID 34493940, citing East Koshkonong Lutheran Cemetery, Christiana, Dane County, Wisconsin, USA; Maintained by El Memorializer (contributor 47029561). (Troverdighet: 3).
https://www.findagrave.com/memorial/34493940/donald_clair-berge
- [S32] Avis, The Wisconsin Tobacco Reporter, Edgerton,W isconsin
Friday 28 October 1921 (Troverdighet: 3).
- [S46] Ancestry.com, Wisconsin, vigselböcker, 1820-2004 [webbaserad databas]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2022. (Troverdighet: 3).
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