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Mackinac Bridge Authority (n.d.). "Photo Gallery". Mackinac Bridge Authority. Archived from the original on December 22, 2009. Retrieved January 30, 2010.
"2010 Stamp Designs" (Press release). United States Postal Service. December 30, 2009. Archived from the original on April 19, 2010. Retrieved March 28, 2024.
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