Olga Christine (a) Smith

"New Hampshire Marriage Records, 1637-1947," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FLD5-681 : 12 December 2014), Nils Enger in entry for George Gilbert, Ii Smith and Olga Christine Enger, 04 Jul 1935; citing Milford, Hillsborough, New Hampshire, Bureau of Vital Records and Health Statistics, Concord; FHL microfilm 2,070,087.

"Massachusetts Births, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FXV2-H64 : 1 March 2016), Nils Engar in entry for Olga Christina Engar, 07 Dec 1913, Lowell, Middlesex, Massachusetts; citing reference ID #p 598, Massachusetts Archives, Boston; FHL microfilm 2,409,732.