Michiel Gosselaar married Sara Blog in Amsterdam on 19 March 1942, a daughter of David Blog and Branca van der Bokke. Per 27 February their latest address was Retiefstraat 51 I in Amsterdam.
City Archive of Amsterdam, archive cards of Michiel Gosselaar and Sara Blog.
In addition, Jokos files (numbers 55208, 55105) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.