When copying data from this family tree, please include a reference to the origin: Hans van Melis, "Sigarenfabrikanten en anderen in Eindhoven en de Kempen", database, Genealogy Online (https://www.genealogieonline.nl/sigarenfabrikanten-eindhoven/I13808.php : accessed September 23, 2024), "Derkje Nijkamp (1856-1938)".
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Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
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