1 Family Tree - Ancestry World Tree Project [Ancestry.com], Entry for Oscar Kirk Ehlers & Otellia Bertina Hillesland.

2 Family Tree - Ancestry World Tree Project [Ancestry.com], Entry for Oscar Kirk Ehlers and Otellia Bertina Hillesland.

3 Ancestry.com, 1940 United States Federal Census (Name: Online publication - Provo, UT, USA: Ancestry.com Operations, In c., 2012.Original data - United States of America, Bureau of the Censu s. Sixteenth Census of the United States, 1940. Washington, D.C.: Nati onal Archives and Records Administration, 1940. T627;), Year: 1940; Census Place: Ellendale, Dickey, North Dakota; Roll: T627_2999; Page: 2A; Enumeration District: 11-8A.

4 Death Certificate - Ehlers, Otellia, Death Certificate for Otellia Bertina Ehlers, date of death: Jan. 16, 1989 while at home in Britton, South Dakota.

5 Ancestry.com, 1930 United States Federal Census (Name: Online publication - Provo, UT, USA: Ancestry.com Operations Inc , 2002.Original data - United States of America, Bureau of the Census . Fifteenth Census of the United States, 1930. Washington, D.C.: Natio nal Archives and Records Administration, 1930. T626,;), Year: 1930; Census Place: Ellendale, Dickey, North Dakota; Roll: 1734; Page: 3B; Enumeration District: 8; Image: 632.0.

6 Ancestry.com, Social Security Death Index (Name: Online publication - Provo, UT, USA: Ancestry.com Operations Inc , 2010.Original data - Social Security Administration. Social Securit y Death Index, Master File. Social Security Administration.Original da ta: Social Security Administration. Social Security D;), Number: 503-24-0515; Issue State: South Dakota; Issue Date: Before 1951.

7 Ancestry.com, 1920 United States Federal Census (Name: Online publication - Provo, UT, USA: Ancestry.com Operations Inc , 2010. Images reproduced by FamilySearch.Original data - Fourteenth C ensus of the United States, 1920. (NARA microfilm publication T625, 20 76 rolls). Records of the Bureau of the Census, Reco;), Year: 1920; Census Place: Cameron, Ward, North Dakota; Roll: T625_1342; Page: 6B; Enumeration District: 212; Image: .

8 Ancestry.com, 1910 United States Federal Census (Name: Online publication - Provo, UT, USA: Ancestry.com Operations Inc , 2006.Original data - Thirteenth Census of the United States, 1910 (N ARA microfilm publication T624, 1,178 rolls). Records of the Bureau o f the Census, Record Group 29. National Archives, Was;), Year: 1910; Census Place: Vang, Ward, North Dakota; Roll: ; Page: ; Enumeration District: ; Image: .