2nd row from the top, 3rd from the left Henriette Polak, 3rd row from the top, 3rd from the left Marianne Polak and on the 1rst row, 3rd from the left Duifje Polak.
In addition, a Jokos file (number 16864) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.