Post card dated 30 May 1943, sent from Camp Westerbork by Isak Kornblüt to his son-in-law Cor Boot in Wormerveer, the husband of Isak's daughter Rosa Kornblüt. Private collection
In addition, a Jokos file (number 61409) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.