Betsy Flora van Praag worked as a nanny in the Apeldoornse Bos, where she started working on 9 July 1942.
Municipal Archives Apeldoorn, list of employees of the Apeldoornsche Bosch
In addition, a Jokos file (number 7693) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.