Jacoba Hermina Koster en tant qu·Äôentrâ©e de Jacob van der Wees, "Netherlands, Archival Indexes, Vital Records, 1600-2000"
"Nederland, Indexen van de Archieven, Primaire Archiefstukken (BS en DTB), 1600-2000," database,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:QLKY-6PJK : 9 September 2017), Jacoba Hermina Koster in entry for Jacob van der Wees, Death 02 Oct 1947, Rotterdam, Zuid-Holland, Nederland; from database,
openarchives (https://www.openarch.nl : 2016); citing Soest, archive 1221, inventory number 1794, record number 229; ; Het Utrechts Archief.