Sources
Entry on Norbert Israel in the online remembrance book of the Göttingen region
The Göttingen remembrance book summarizes what is known and has been gathered about Norbert Israel in a short biography.
Norbert Israel, Online Memorial Book for Victims of Nazi Persecution in the Göttingen Region. Available at: https://stadtarchiv.goettingen.de/portal/aseiten/Seite-902000010-25480.html?naviID=reset1&personID=900000831
