"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL5R-G15Z : 6 October 2017), Joannes Gerardus de Natris and Margaretha Maria Hendrika van Nunen, Marriage 15 May 1905, Valkenswaard, Noord-Brabant, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Registers van huwelijksakten, archive 15321, inventory number 1189, record number; Registers van huwelijksakten; Regionaal Historisch Centrum Eindhoven.
"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL5F-GM1J : 6 October 2017), Margaretha Maria Hendrika van Nunen in entry for Petrus Antonius Franciscus de Natris and Petronella Johanna Cornelia Koolen, Marriage 20 Aug 1938, Valkenswaard, Noord-Brabant, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Valkenswaard, archive 405, inventory number 575, record number 58; ; Brabants Historisch Informatie Centrum.
"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL7L-FDPX : 22 August 2017), Margaretha Maria Hendrika van Nunen, Birth 08 May 1880, Hoogeloon, Noord-Brabant, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Hoogeloon, Hapert en Casteren, archive 50, inventory number 4444, record number 17; ; Brabants Historisch Informatie Centrum.
"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL5J-Q398 : 6 October 2017), Margaretha Maria Hendrika van Nunen in entry for Hendricus Gerardus Johannes de Natris and Maria Joanna Augustina Wouters, Marriage 16 Jul 1937, Eindhoven, Noord-Brabant, Nederland; from database, openarchives (https://www.openarch.nl : 2016); citing Eindhoven, archive 405, inventory number 169, record number 433; ; Brabants Historisch Informatie Centrum.