United States. Department of the Treasury. Citizens Coinage Advisory Committee , United States. Department of the Treasury and United States. Bureau of the Mint. "Meeting, April 27, 2010 : Federal Register Notice" in Citizens Coinage Advisory Committee Meetings, Recommendations, and Minutes (April 27, 2010). https://fraser.stlouisfed.org/title/7136/item/646831/content/pdf/ccac20100427notice, accessed on June 4, 2026.