2007-01-23. City Hall retrofit project photos and description of Pasadena City Hall Project Engineers' diagrams explaining the seismicretrofit of Pasadena City
(原始内容存档于2009-06-17). WSDOT - Project - SR 99 - Aurora Bridge and Column SeismicRetrofit. Washington State Department of Transportation. [2011-06-06]. (原始内容存档于2011-06-03)