アイオワシティ
State Historical Society of Iowa. 1893年.
↑ Manshiem, Gerald. Iowa City: An Illustrated History. p.25. The Donning Co, Publishers. 1989年.
↑ Pitts, Carolyn. National Register of Historic Places Inventory-Nomination: Old Capitol / Third Capitol of the Territory of Iowa and First of the State of Iowa. National Park Service. 1975年7月. (PDFファイル/343KB)
↑ National Register Information System Archived 2010年5月27日, at the Wayback Machine.. National Register of Historic Places. National Park Service.
↑ Old Capitol (Iowa) Archived 2012年10月5日, at the Wayback Machine.. National Historic Landmark summary listing. National Park Service.