When copying data from this family tree, please include a reference to the origin: T. J. Roos, "Koole's van het eiland IJsselmonde", database, Genealogy Online (https://www.genealogieonline.nl/kooles-van-het-eiland-ijsselmonde/I1976.php : accessed May 24, 2024), "Mary Elizabeth (± 1903-1988)".
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