Gerrit Bakker in entry for Marten Schaap and Marritje Bakker, "Netherlands, Archival Indexes, Miscellaneous Records"
"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:QLMN-WXP4 : 22 August 2017), Gerrit Bakker in entry for Marten Schaap and Marritje Bakker, Marriage 16 Sep 1849, Huizen, Noord-Holland, Netherlands; from database,
openarchives (https://www.openarch.nl : 2016); citing Haarlem, inventory number , record number 17; ; Noord-Hollands Archief.