"Iowa, County Births, 1880-1935," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KHTG-C6W : 1 April 2020), Martin Christianson in entry for Christiansen, 26 Aug 1890; citing Iowa, United States; county district courts, Iowa; FHL microfilm 1,479,594.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MG94-2MF : accessed 11 February 2023), Martin Christensen, Council Bluffs Ward 5, Pottawattamie, Iowa, United States; citing enumeration district (ED) ED 142, sheet 10A, family 213, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 421; FHL microfilm 1,374,434.
"Find a Grave," database with images, Find A Grave: Memorial #130367869 (accessed 10 February 2023), Memorial page for Martin A Christensen (3 Mar 1861-7 Aug 1938), citing Cedar Lawn Cemetery, Council Bluffs, Pottawattamie County, Iowa, USA; Maintained by Bob Hansen (contributor 47323324).
↑ First-hand information as remembered by Robert Hansen, Sunday, August 17, 2014. Replace this citation if there is another source.
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