Article 2, Section 9, Constitution of the State of Florida. State of Florida. http://www.leg.state.fl.us/statutes/index.cfm?mode=constitution&submenu=3&tab=statutes#A02S09. Retrieved 2008-12-08. . "2000 Census" (ZIP). US Census Bureau. Retrieved 2007-07-18.  "Annual Population Estimates 2000 to 2008". US Census Bureau. Retrieved 2008-12-25.  "Elevations and Distances in the United States". U.S Geological Survey. April 29, 2005. Retrieved November 3 2006.  Unknown parameter |dateformat= ignored (help); Check date values in: |access-date= (help)