"Michigan Births and Christenings, 1775-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4L8-8VB : 11 February 2018), Arend Van Der Kolk in entry for Albert Van Der Kolk, 01 Jan 1870; citing , , OTTAWA, MICHIGAN, reference 2:16S1DCD; FHL microfilm 984,233.