"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QLR3-5XS2 : 6 October 2017), Petronella Adriana Vogt in entry for Martinus Monné and Jacoba van Ommen, Marriage 19 Jul 1911, Utrecht, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Utrecht, archive 463, inventory number 527-02, record number 498; ; Het Utrechts Archief.