Mary was born in 1925.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XQVJ-QRX : accessed 2 March 2018), Mary L Burnett in household of Herman L Burnett, Becker, Roberts, South Dakota, United States; citing enumeration district (ED) ED 3, sheet 3A, line 21, family 44, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2230; FHL microfilm 2,341,964.
"Pedigree Resource File," database, FamilySearch (https://familysearch.org/ark:/61903/2:2:9HKH-P1G : accessed 2 March 2018), entry for Mary Lavina Burnett; file (2:2:2:MM9R-CTY), submitted 10 February 2002 by rstrouse2743352 [identity withheld for privacy].
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