https://www.mappingthelives.org/bio/19d431fd-a183-4f60-a1a9-30bfb1cabace
Karl Herz (1869 - 1944) - Genealogy (geni.com)
https://www.jewishgen.org/yizkor/Mainz/files/Mainz.pdf (page 96)
Terezín Memorial (pamatnik-terezin.cz)