https://www.mappingthelives.org/bio/31ab364b-e899-4949-8128-f8c93368f959
https://beeldbank.kazernedossin.eu/portal/media/search/683a00074e8d49eba95054d816498aadb30f42d4d8b340b1afaa04a5437a14270e4b82efab2f485f9423391aaf4d4e68/details
https://beeldbank.kazernedossin.eu/portal/media/search/a178f29de66e42a7aa68810712a67a5a1d6999d3c7ed493ebaae09694631ba6a443b81ae0afb4a66a0133b358235da80/details
Berta Wallerstein (Weber) (1875 - d.) - Genealogy (geni.com)
https://www.alemannia-judaica.de/andernach_synagoge.htm