Grenada, sheet of 4 stamps. The President Obama International Stamp Collection. No date given.
Yes We Can, We Did, President Barack Obama Historic Commemorative Postal Issue. 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/149/
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