| Sources |
- [S1657217672] Ancestry.com, Ohio, U.S., Rutherford B. Hayes Presidential Center Obituary Index, 1810s-2016, (Ancestry.com Operations, Inc.), Rutherford B. Hayes Presidential Center; Spiegel Grove, Fremont, Ohio; Rutherford B. Hayes Presidential Center Ohio Obituary Index, 1830s to 2011.
- [S1640033476] Ancestry.com, 1940 United States Federal Census, (Ancestry.com Operations, Inc.).
- [S1656107014] Ancestry.com and Ohio Department of Health, Ohio, U.S., Death Records, 1908-1932, 1938-2018, (Ancestry.com Operations Inc), Ohio Department of Health; Columbus, Ohio; Ohio Deaths, 1908-1932, 1938-1944, and 1958-2007.
- [S1640034039] Ancestry.com, 1930 United States Federal Census, (Ancestry.com Operations Inc).
- [S1656107002] Ancestry.com, Ohio, U.S., County Marriage Records, 1774-1993, (Ancestry.com Operations, Inc.).
- [S1640033586] Ancestry.com, Newspapers.com Obituary Index, 1800s-current, (Ancestry.com Operations Inc), Marysville Journal-Tribune; Publication Date: 17 May 2003; Publication Place: Marysville, Ohio, USA; URL: https://www.newspapers.com/image/324525594/?article=07776904-2e7e-4bfc-b17c-500a499dd543&focus=0.02922622,0.51075125,0.35193455,0.689645&xid=3355.
- [S1666823092] Newspapers.com - Marysville Journal-Tribune - 17 May 2003 - Page 2, (Marysville Journal-Tribune), Obituary for LEWIS JOHN SCHWARTZKOPF (Aged 73) 17 May 2003.
- [S1640033586] Ancestry.com, Newspapers.com Obituary Index, 1800s-current, (Ancestry.com Operations Inc), Marysville Journal-Tribune; Publication Date: 31 Jan 1985; Publication Place: Marysville, Ohio, USA; URL: https://www.newspapers.com/image/329441498/?article=5567e93e-57ce-4aa8-8fb8-7e421b46124a&focus=0.036404543,0.29496223,0.27147633,0.568564&xid=3355.
|