In addition, a Jokos file (number 4324) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
In April 1943 all Jews in Winterswijk got the message that they should report to Vught concentration camp. Mother and daughter Poppers then had a drapery shop in the Meddosestraat. On the day of departure Betti Poppers has made a picture of herself and her mother. She told the photographer, she would come to get the picture as soon as they had come back. Freriks Nieuws, No. 65 (1993), p. 8