↑ "Iowa, Delayed Birth Records, 1850-1939," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q24D-YV4G : accessed 11 March 2020), Sidney Alfred Ackerson, 15 Sep 1893, Cedar Falls Township, Black Hawk, Iowa, United States; citing reference ID 49897, State Historical Society of Iowa, Des Moines; FamilySearch digital folder 101693733.
Find A Grave, database and images (https://www.findagrave.com : accessed 23 February 2020), memorial page for Sidney Ackerson (15 Sep 1892–5 Feb 1954), Find A Grave: Memorial #25777487, citing Oakland Cemetery, Fort Dodge, Webster County, Iowa, USA ; Maintained by Alan Dorothy (contributor 46931290) .
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