In August 1940, three obituaries were placed in the Nieuw Israëlietisch Weekblad for S. Fierlier. One notice was on behalf of the Metal Goods Factory A. Gezang & Co placed for the 'dear Partner and Friend'.
Nieuw Israëlietisch Weekblad, 23 August 1940
In addition, a Jokos file (number 54759) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.