Several letters to a female school friend written by Josina Elize van Gelder between September 1941 and April 1943 have been preserved. She wrote the last of these letters at Vught concentration camp.
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Josina Elize van Gelder was deported to Sobibor in June 1943 …
In addition, a Jokos file (number 53466) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.