A copy of the ketubah remains of Herman de Beer and Rosetta van der Borg. They had their chuppah in Apeldoorn on 1 December 1940.
Municipal archive Apeldoorn, Records Nederlands Israëlitische Gemeente Apeldoorn
In addition, a Jokos file (number 33430) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
A Liro card exists for this person or family. The original cards are kept at the Nationaal Archief (National Archive) at The Hague.