President Barack Obama, Historic Commemorative Postal Issue, Liberia, sheet of 4 stamps. The President Obama International Stamp Collection. No date given.
Change Has Come to America. No date. Rodney Lawrence Hurst, Sr. Papers. University of North Florida. Thomas G. Carpenter Library. Special Collections and Archives. UNF Digital Commons. https://digitalcommons.unf.edu/hurst_stamps/128/
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