"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2G1-RL7 : accessed 25 April 2023), Abraham Matti, Blowers, Otter Tail, Minnesota, United States; citing enumeration district (ED) ED 133, sheet 9A, family 74, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 714; FHL microfilm 1,374,727.
"United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:X382-7DZ : accessed 25 April 2023), Abraham Matti, Blowers, Otter Tail, Minnesota, United States; citing enumeration district (ED) ED 5, sheet 3A, line 47, family 43, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1111; FHL microfilm 2,340,846.
"Minnesota Deaths, 1887-2001," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:HF9H-7TN2 : 8 April 2020), Maria Johanna Matti, 25 Mar 1954; citing Death, Minnesota State Department of Health, St. Paul.
Find a Grave, database and images (https://www.findagrave.com/memorial/64951191/maria-johanna-matti: accessed 25 April 2023), memorial page for Maria Johanna Pantsari Matti (20 Jun 1861–25 Mar 1954), Find a Grave Memorial ID 64951191, citing Hay Creek Cemetery, Otter Tail County, Minnesota, USA; Maintained by Finnesota (contributor 48968370).