Izaäc Gosschalk can be seen on a group picture of 22 Jewish children, made at the end of September 1942 on the courtyard of the synagogue in Deventer. In 2008 a documentary was made about this picture, called “Een foto, een zoektocht, de herinnering”, by the Etty Hillesum Centrum in Deventer
In addition, a Jokos file (number 3028) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.