Emanuel Dikker and Sara Viskoop married in 1922 in Amsterdam.
Stadsarchief Amsterdam, archiefkaart Emanuel Dikker
In addition, a Jokos file (number 53775) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 2658/4126).