"Minnesota Deaths and Burials, 1835-1990," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FDCF-92P : 4 December 2014), Olaus Johnsrud, 02 Feb 1938; citing Houston Co, Minnesota, reference p233 cn127; FHL microfilm 1,316,885.
"Minnesota Marriages, 1849-1950 ," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FDDL-54B : 4 December 2014), Olaus H. Johnsrud and Randi H. Ellestad, 15 May 1886; citing FHL microfilm 1,316,886.
"Minnesota State Census, 1895," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MQ6X-DF8 : 3 April 2016), O H Johnsrud, Wilmington township, Houston, Minnesota; citing p. 3, line 21, State Library and Records Service, St.Paul; FHL microfilm 565,783.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9S8-LRF : accessed 1 January 2018), Olaus Johnsrud, Wilmington Township, Houston, Minnesota, United States; citing enumeration district (ED) 77, sheet 6B, family 103, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,765.
"Minnesota State Census, 1905," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SP3W-M69 : 3 August 2017), Olaus Johnsrud, Wilmington township, Houston, Minnesota; citing p. 69, line 406, State Library and Records Service, St.Paul; FHL microfilm 928,788.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWBM-C58 : accessed 1 January 2018), Olam H Johnsrud, Wilmington, Houston, Minnesota, United States; citing ED 75, sheet 7A, line 29, family 7, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 840; FHL microfilm 1,820,840.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X389-QYK : accessed 1 January 2018), Olaus H Johnsrud in household of Harold M Johnsrud, Wilmington, Houston, Minnesota, United States; citing enumeration district (ED) ED 21, sheet 5A, line 45, family 100, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1101; FHL microfilm 2,340,836.
"Minnesota Deaths and Burials, 1835-1990," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FDCF-92P : 4 December 2014), Olaus Johnsrud, 02 Feb 1938; citing Houston Co, Minnesota, reference p233 cn127; FHL microfilm 1,316,885.