↑United States Census, 1900, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M93W-KNJ : accessed 7 March 2019), John Ebbeson, Gorman Township, Otter Tail, Minnesota, United States; citing enumeration district (ED) 154, sheet 5A, family 70, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,77
↑United States Census, 1910, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MV2K-BDB : accessed 7 March 2019), John W Mattern, Lemoore, Kings, California, United States; citing enumeration district (ED) ED 180, sheet 5B, family 103, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 79; FHL microfilm 1,374,092.
↑United States Census, 1920, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHNH-M7F : accessed 7 March 2019), John W Mattern, Sedro-Woolley, Skagit, Washington, United States; citing ED 114, sheet 4B, line 54, family 90, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1935; FHL microfilm 1,821,935.
↑United States Census, 1930, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XC3V-F2K : accessed 7 March 2019), Hattie Mattern in household of John W Mattern, Port Orchard, Kitsap, Washington, United States; citing enumeration district (ED) ED 41, sheet 4A, line 9, family 83, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2506; FHL microfilm 2,342,240.
↑United States Census, 1940, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K99F-FL6 : 15 March 2018), Orwin W Mattern, Ward 2, Vancouver, Election Precinct 62 Vancouver, Clark, Washington, United States; citing enumeration district (ED) 6-71, sheet 5A, line 16, family 32, 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 4335.
↑Find A Grave, database and images (https://www.findagrave.com : accessed 07 March 2019), memorial page for Harriet Mattern (unknown–19 Mar 1966), Find A Grave Memorial no. 107238264, citing Lakeside Cemetery, Frazee, Becker County, Minnesota, USA ; Maintained by ckp75 (contributor 47007002) .
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