MHS has many in-house comprehensive finding aids but has been posting some on its website.
A few examples:
War Records Commission: An Inventory of Its World War I Military Service Records Four-page questionnaires, filled out by Minnesota veterans of World War I with biographical data and details of their military service. Thomas Scantlebury and Family: An Inventory of Their Papers U.S.-Dakota War reminiscences of a soldier in Company H of the Seventh Minnesota Infantry, accompanied by three diaries (1853-1857) and miscellaneous family information relating in part to the establishment of New Auburn (Sibley County), Minnesota. Gillette Hospital: An Inventory of Its Admission Registers Admission information for children treated at the Gillette State Hospital for Crippled
Children and its predecessor, the State Hospital for Crippled and Deformed Children.
Faith United Church of Christ (Minneapolis, Minn.): An Inventory of Its Records. Membership, baptism, marriage, burial, and other official records of Faith United Church of Christ.
Explore these and others on the MHS website.