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- ↑ Melissa Nann Burke (January 5, 2015). "Delaware a Small Wonder no more?". Delaware Online. Retrieved March 10, 2015.
- ↑ The State of Delaware. "State of Delaware". delaware.gov. Archived from the original on Bisha Lixaad 19, 2013. Retrieved September 27, 2015.
{{cite web}}: Check date values in:|archive-date=(help); Unknown parameter|ciwaan=ignored (help); Unknown parameter|dead-url=ignored (|url-status=suggested) (help) - ↑ USGS, Howard Perlman,. "Area of each state that is water". water.usgs.gov.
{{cite web}}: CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link) - ↑ "Delaware: Population estimates". U.S. Census Bureau. July 1, 2017. Retrieved May 6, 2017.
- ↑ "Median Annual Household Income". The Henry J. Kaiser Family Foundation. Retrieved December 9, 2016.
- 1 2 "Elevations and Distances in the United States". United States Geological Survey. 2001. Archived from the original on October 15, 2011. Retrieved October 21, 2011.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ↑ Elevation adjusted to North American Vertical Datum of 1988.
- ↑ Schenck, William S. "Highest Point in Delaware". Delaware Geological Survey. Archived from the original on October 20, 2008. Retrieved July 23, 2008.
{{cite journal}}: Cite journal requires|journal=(help); Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ↑ Molly Murray (January 6, 2015). "Delaware's new tourism brand: Endless Discoveries". Delaware Online. Retrieved March 10, 2015.