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- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 29 Jun 2016), entry for Klaastina Catharina van Heuveln, person ID K64R-5QP.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 29 Jun 2016), entry for Klaastina Catharina van Heuveln, person ID 9NTC-V2T.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">
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- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 29 Jun 2016), entry for Klaastina Catharina van Heuveln, person ID K64R-5QP.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 29 Jun 2016), entry for Klaastina Catharina van Heuveln, person ID 9NTC-V2T.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">