Found death record for Gretchen L. Rauscher, born January 2, 1905 in WI, and died September 20, 1999 in Littlefork, Koochiching County, MN. I believe her maiden name was Gretchen L. Phillips, daughter of Lewis Stephen Phillips and Nellie Maud (Priest) Phillips Krueger.
Did she marry Joseph John Rauscher after his second wife died in 1951? Or was she the wife of some other Rauscher?
In the 1930 census, Joseph J. Rauscher and family were living in International Falls, Roll T626_1102, Page 19B. Gretchen Phillips was also living in International Falls with her stepfather, Adelbert Charles Krueger, and her mother, Roll T626_1102, Page 14B, so they were certainly living in the same area.