Appendix E. – Ranking Tables(PDF). State and Metropolitan Area Data Book: 2006 (U.S. Census Bureau). 2008-12-22 [2009-04-29]. (原始内容存档(PDF)于2009-03-25).
Appendix E. – Ranking Tables(PDF). State and Metropolitan Area Data Book: 2006 (U.S. Census Bureau). 2008-12-22 [2009-04-29]. (原始内容存档(PDF)于2009-03-25).