Great Northern Technical Drawing 1219-31, Crossing Union Terminal (2 copies), undated. Other subject categories: Drawing

Great Northern Blueprint Number 1240-34-5, Great Northern Sioux City Crossing, undated. Other subject categories: Drawing

Great Northern Blueprint Number 1240-34-6, Great Northern Sioux City Crossing, undated. Other subject categories: Drawing

Great Northern Technical Drawing 1219-31-3, Crossing Frogs Illinois Central & Union Terminal (Superceded), undated. Other subject categories: Drawing

Great Northern Blueprint Number 1240-32-4, Great Northern Sioux City Crossing, undated. Other subject categories: Drawing

Great Northern Technical Drawing 1219-31-9, Crossing Chicago, St. Paul, Minneapolis and Omaha Railway, undated. Other subject categories: Drawing

Great Northern Blueprint Number 1240-32-3, Great Northern Sioux City Crossing, undated. Other subject categories: Drawing

Rand McNally Standard Map Showing Railroads - Iowa, undated. Other subject categories: Map

Great Northern Blueprint Number 1249-12-5, map of Block 29, Sioux City, 1911. Other subject categories: Map

Great Northern Blueprint Number 1249-12-6, map of Ordinance Plat Block 29, Sioux City, 1912. Other subject categories: Map