"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QLRW-35LY : 6 October 2017), Johanna van der Borg in entry for Cornelis Johannes van Leeuwen and Anthonia Agterberg, Marriage 02 Jul 1903, Utrecht, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Utrecht, archive 463, inventory number 519-02, record number 387; ; Het Utrechts Archief.
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