Next to Sara and Alida, Benjamin Koster and Anna Blits also had a son, Gerrit, who lived in the psychiatric facility Apeldoornse Bos.
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In addition, a Jokos file (number 21043) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for c…