Document describing a collection of records held in the Minnesota Discovery Center Archives documenting the activity of the Butler Brothers and Hanna Mining Company.
Document describing a collection of records held at the Iron Range Research Center documenting the activity of Peter Del Greco, a former United States Steel employee.
Del Greco, Peter; Chisholm (Minn.); United States Steel Corporation; Iron mines and mining--Minnesota.
Document describing a collection of records held at the Iron Range Research Center documenting the activity of the Northeastern Minnesota Municipal Power Agency
Document describing a collection of records held at the Iron Range Research Center documenting the activity of the Northern Minnesota Municipal Electric Association
