タスカンビア (アラバマ州)
↑ American FactFinder. U.S. Census Bureau. 2011年2月4日.
↑ アイビー・グリーンの位置 (300 West North Commons, Tuscumbia, AL). Yahoo!Map.
↑ Helen Keller Home, Ivy Green Grounds. Helen Keller Birthplace Foundation.
↑ Miller, Page Putnam. USDI/NPS NRHP Registration Form: Ivy Green, and attached photos. National Park Service. 1991年6月7日.(PDFファイル)
↑ Ivy Green (Helen Keller Birthplace) Archived 2009年3月1日, at the Wayback Machine.. National Historic Landmarks Program. National Park Service.
1 2 3 Our History. City of Tuscumbia.
↑ Floyd, Warner W. National Register of Historic Places Inventory - Nomination Form: Colbert County Courthouse Square Historic District and attached photos. National Park Service. 1973年3月30日.