In addition, a Jokos file (number 9554) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had an electrical supply shop, address Biesboschstraat 44 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives