(PDF). City of Seattle Engineering Department. [2014-02-25]. (原始内容存档 (PDF)于2016-03-03). 西雅圖交通部(英语:SeattleDepartmentofTransportation). Bridges and Roadway
Information System. National Register of Historic Places. National Park Service. 2007-01-23. SeattleDepartmentofTransportation. Ballard Bridge. Bridges and