- FamilySearc
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Alida Johanna Eckard, person ID 2CBY-F26.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Alida Eckard, person ID 2CBY-FK7.
» Les sources » Arbre généalogique M. Tolsma » Généalogie Online">
- FamilySearc
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Alida Johanna Eckard, person ID 2CBY-F26.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Alida Eckard, person ID 2CBY-FK7.
» Les sources » Arbre généalogique M. Tolsma » Généalogie Online">