https://www.mappingthelives.org/bio/07d7f754-7c9f-4758-b6de-c43726dc7885
https://www2.landesarchiv-bw.de/ofs21/bild_zoom/thumbnails.php?bestand=23911&id=3314217&syssuche=guthermann+güthermann&logik=und
https://www.alemannia-judaica.de/archshofen_synagoge.htm