Irene Rosenberg (on the right with white knot) on the 21th of May 1941 in Zoo Artis with the fourth class of the Dongeschool in the Dintelstraat. On the right site of Irene: Sara Mathijse.
In addition, a Jokos file (number 51616) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.