https://www.joodsmonument.nl/nl/page/187314/paul-cassel
https://mappingthelives.org/bio/210d95e3-11e2-49da-8180-fba5b0e3028a
#typo #geo [Rijnstraat]
https://archief.amsterdam/indexen/deeds/98533408-d3c2-56a3-e053-b784100ade19?person=98533408-d3c3-56a3-e053-b784100ade19