The census sources cited below have some variances (e.g. the 1900 census name the husband Adam) however I am satisfied these sources all refer to subject.
"Minnesota State Census, 1895," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MQD2-PL8 : accessed 27 January 2016), Sophia Peterson in household of Adolf Peterson, Long Lake, Crow Wing, Minnesota; citing p. 6, line 18, State Library and Records Service, St.Paul; FHL microfilm 565,768.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9S3-KDP : accessed 27 January 2016), Sofie Peterson in household of Adam Peterson, Long Lake & Maple Grove Townships, Crow Wing, Minnesota, United States; citing sheet 4B, family 63, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,761.
"Minnesota State Census, 1905," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SPSV-G1X : accessed 27 January 2016), Sophia Pettersen, Long Lake township, Crow Wing, Minnesota; citing p. 252, line 9, State Library and Records Service, St.Paul; FHL microfilm 928,774.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2LL-RN8 : accessed 27 January 2016), Sophie Petersen in household of Adolph Petersen, Long Lake, Crow Wing, Minnesota, United States; citing enumeration district (ED) ED 44, sheet 6B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,707.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWYW-6H9 : accessed 27 January 2016), Mrs. Sophe Peterson, Long Lake, Crow Wing, Minnesota, United States; citing sheet 4A, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,829.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KSKF-VRN : accessed 7 February 2016), Sophia Peterson in household of Eddie Peterson, Long Lake Township, Crow Wing, Minnesota, United States; citing enumeration district (ED) 18-36, sheet 7A, family 119, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1916.
Interview with Dan [Peterson-4473|Peterson] 8/11/2016 gave date of death as 1944.
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