Gezinskaart Cornelis Franciscus Walters Rotterdam Archief Stadsarchief Rotterdam Rechtstreekse Verwijzingen https://hdl.handle.net/21.12133/B20324698FEC4EE18410A953DB03C392 https://hdl.handle.net/21.12133/DD9AB5C5A1F74F1EB00B179F464CDA82 https://hdl.handle.net/21.12133/4A411ACBBE8546BBBA84C66073913D83