Here are (4) Reference Sheets from the Great Northern Historical Society. Reference Sheets include: 243 (June 1996) Stories - Historical and Personal of or by the People whose Efforts helped Create the Great Northern Railway, 244 (September 1996) The Great Northern Empire Builder Part 5: 1960-1970, 245 (September 1996) Great Northern Mill Gondola Cars Part II: Series 79000-79099, 246 (September 1996) Explosion at Cass Lake Roundhouse. Used and in good condition. We combine shipping on multiple items.