In addition, a Jokos file (number 52984) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had an ironmonger's shop, address: Admiraal de Ruijterweg 65 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives
See for additional information on this family:
A.L. Boom (also known as Kees Fens), Mijnheer en mevrouw Aluin en andere tussenteksten (Amsterdam 1981).