↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM6X-VYF : accessed 20 May 2021), Henry P Lorensen in household of Fred S Lorensen, Bay & Erie Township, Ottawa, Ohio, United States; citing enumeration district (ED) 123, sheet 1B, family 21, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,311.
↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLDL-ZHL : accessed 20 May 2021), Henry Lorensen in household of Fred Lorensen, Salem, Ottawa, Ohio, United States; citing enumeration district (ED) ED 177, sheet 5A, family 94, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1220; FHL microfilm 1,375,233.
↑ "Ohio, County Marriages, 1789-2016," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:2Q7M-5MK : 8 March 2021), Henry Lorensen and Helen Witt, 14 Feb 1924; citing Marriage, Ottawa, Ohio, United States, , Franklin County Genealogical & Historical Society, Columbus; FHL microfilm.
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4HY-Q4B : accessed 20 May 2021), Henry Lorensen, Salem, Ottawa, Ohio, United States; citing enumeration district (ED) ED 22, sheet 6B, line 90, family 153, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1860; FHL microfilm 2,341,594.
↑ "United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KWL9-7CL : 9 January 2021), Henry Lorensen, Salem Township, Ottawa, Ohio, United States; citing enumeration district (ED) 62-32, sheet 11A, line 10, family 203, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3125.