Iowa, Delayed Birth Records, 1850-1939," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:Q246-5L7Z : accessed 17 June 2018), Jennie Dykstra in entry for Charley Vos, 07 May 1912, Sully, Jasper, Iowa, United States;citing reference ID 344282, State Historical Society of Iowa, Des Moines; FamilySearch digital folder 101715036.