- [S2252] Egger Arnold Family Tree
- [S2253] Lenny Family Tree
- [S2255] Jones Welsman Family Tree
- [S2256] "Illinois, Cook County, Birth Certificates, 1871-1949", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:N7QP-MFX : Thu May 09 21:02:35 UTC 2024), Entry for Louise Elizabeth Holtz and Walter M Holtz.
- [S2257] "United States Census, 1920", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MFK7-X1J : Sun Jul 14 16:38:54 UTC 2024), Entry for Walter Holtz and Bertha Holtz, 1920.
- [S2258] "United States Census, 1930", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:X9S4-BDT : Fri Mar 08 16:13:53 UTC 2024), Entry for Walter Holz and Bertha Holz, 1930.