Elisabeth Tromp en tant qu·Äôentrâ©e de Petronella van Aalsburg, "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:QL46-GDHC : 23 August 2017), Elisabeth Tromp in entry for Petronella van Aalsburg, Birth 22 Oct 1836, Heukelum, Gelderland, Nederland; from database,
openarchives (https://www.openarch.nl : 2016); citing Heukelum, archive 0207, inventory number 33817, record number 18; ; Gelders Archief.