I did not find a birth record either in Minnesota. I am expanding the search to other states just in case. I did find an obituary which may give some possible relatives names:
Great Falls Tribune (Great Falls, Montana), Wednesday, 28 April 2004, pg. 10.
Obituary for Inga (Skari) Haugen, 105 a native of North Dakota. No children. Mentions nieces and nephews: Donald Skari of San Dimas, CA; Betty Smith of Warner-Robins, GA; Severt Spoonheim of Cartwright, ND; Anne Lund of Yakima, WA; Selma Engen of Ray, ND; Verna Iverson and Grace Johnson of Williston, ND; Esther Kundert of Lodi, CA; Juliette Lundquist of Gresham, OR; Mildred Vernon of Bismarck, ND; Margaret Mai of Encino, CA; Vernon Skari of Denver; Arlo and Morton Skari of Chester. Preceded in death by husband in 1975 and 7 brothers: Peder, Albert, Edwin, Ole, Oliver, Luther, John; two sisters: Anna and Martha; nephews Morton Spoonheim, Iner, Duane, Carman, George Albert Skari, and Einar and Lawrence Vangerud. Her parents were Iver Skari and Marie (Anderson) Skari.