| Quellen |
- [S10185] Ancestry.com, Stammbaumindex der Geneanet-Gemeinschaft, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2022;).
- [S10320] Ancestry.com, Niederlande, Bevölkerungsregisterindex, 1720-1944, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2016;), Stadsarchief Amsterdam; Den Haag, Nederland; Bevolkingsregisters.
Record for Hendrik Christiaan Van Der Velden
https://search.ancestry.com/cgi-bin/sse.dll?db=61289&h=31657702&indiv=try
- [S10669] openarch.nl, Stadtarchiv Den Haag in Den Haag (Niederlande), Bürger Registrierung EhenAmbtenaar van de burgerlijke stand van de gemeente 's-Gravenhage, 's-Gravenhage, Archiv 335-01, Inventarnummer 1018, 04-09-1929, Huwelijksakten Den Haag, Archivnummer A1199.
https://hdl.handle.net/21.12124/45051297934944B0B5E628CD7B9BA693
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