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- [S3] Wikipedia Contributors, Wikipedia: The Free Encyclopedia, "Jeanne Cagney," https://en.wikipedia.org/wiki/Jeanne_Cagney, (San Francisco, CA: Wikimedia Foundation, Inc.).
- [S1] Wikipedia Contributors, Wikipedia: The Free Encyclopedia, "James Cagney," https://en.wikipedia.org/wiki/James_Cagney, (San Francisco, CA: Wikimedia Foundation, Inc.).
- [S4] New York City Department of Records, New York, New York, U.S., Index to Birth Certificates, 1866-1909 [database on-line], (Lehi, UT, USA: Ancestry.com Operations, Inc., 2020).
- [S5] California Department of Public Health, California, U.S., Death Index, 1940-1997 [database on-line], (Provo, UT, USA: Ancestry.com Operations Inc, 2000).
- [S6] New York State Archives, New York, U.S., State Census, 1905 [database on-line], (Lehi, UT, USA: Ancestry.com Operations, Inc., 2014).
- [S8] New York City Department of Records, New York, New York, U.S., Extracted Marriage Index, 1866-1937 [database on-line], (Provo, UT, USA: Ancestry.com Operations, Inc., 2014).
- [S9] Find a Grave, U.S., Find a Grave Index, 1600s-Current [database on-line], (Lehi, UT, USA: Ancestry.com Operations, Inc., 2012).
- [S10] National Archives and Records Administration, 1900 United States Federal Census, Manhattan, Enumeration District 759, New York County, New York National Archives Microfilm Roll T623_1113; 1900 United States Federal Census [database on-line], (Lehi, UT, USA: Ancestry.com Operations, Inc., 2004).
- [S12] New York City Department of Health, James Cagney and Carrie Nelson, Marriage Certificate No. 19755, 22 Dec 1897, Manhattan, New York County, New York, USA.
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