Salomon Barend Matteman worked as a student nurse in the Apeldoornse Bos, where he began working on 11 November 1940.
Municipal Archives Apeldoorn, list of employees of the Apeldoornsche Bosch
In addition, a Jokos file (number 32450) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.