https://www.mappingthelives.org/bio/a7dea18f-974d-409f-aa74-41a137484cf8
https://www.bundestieraerztekammer.de/ns-schicksale/suche/?we_objectID=2581?we_lv_start_2=130
http://www.tenhumbergreinhard.de/taeter-und-mitlaeufer/staedte-1933-1945/muenster-i-westf.html
Alfred Steinberg (deceased) - Genealogy (geni.com)
Liste der Stolpersteine in Münster – Wikipedia