Found in 3 Collections and/or Records:
The collection contains 13 videotapes holding 29 interviews, and 8 topic videotapes. Most interviews are indexed.
The collection contains Halvorson's business records including articles of incorporation and bylaws, stock information, promotional material, and photographs. Also included are family correspondence, photographs, and news clippings, and clippings, correspondence, and photographs related to the Ralph Plaisted Polar Expedition.
The collection reflects some of the basic development and operations of the Duluth Municipal Airport when Earl Olson was manager.