"United States Social Security Death Index," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JTM1-J4H : accessed 23 Feb 2014), Caroline Fingerson, 30 August 1994; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M9VD-KCF : accessed 23 Feb 2014), Caroline Olsen in household of Charly Olsen, Oakville, Skandia, Spring Creek, Svea & T.137, R.59 Townships, Barnes, North Dakota, United States; citing sheet , family 253, NARA microfilm publication T623, FHL microfilm 1241226.
"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MLGX-D6V : accessed 23 Feb 2014), Carolina Olson in household of Charles Olson, Rosebud, Barnes, North Dakota, United States; citing sheet , family 122, NARA microfilm publication T624, FHL microfilm 1375151.
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MWY9-R5L : accessed 23 Feb 2014), Carline O Gudmestad in household of Robert Gudmestad, Dilworth, Clay, Minnesota, United States; citing sheet , family 43, NARA microfilm publication T625, FHL microfilm 1820827.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X38R-CTG : accessed 23 Feb 2014), Keroline O Olson in household of Charles Olson, Glenwood, Pope, Minnesota, United States; citing enumeration district (ED) 0010, sheet , family 34, NARA microfilm publication.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KSKD-45Z : accessed 23 Feb 2014), Caroline Fingerson in household of Peder Fingerson, Glenwood Township, Pope, Minnesota, United States; citing enumeration district (ED) 61-10, sheet 5B, family 86, NARA digital publication of T627, roll 1950.
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