United States. Department of the Treasury. Citizens Coinage Advisory Committee , United States. Department of the Treasury and United States. Bureau of the Mint. "Meeting, March 20, 2007 : Federal Register Notice" in Citizens Coinage Advisory Committee Meetings, Recommendations, and Minutes (March 20, 2007). https://fraser.stlouisfed.org/title/7136/item/646898/content/pdf/ccac20070320notice, accessed on December 1, 2023.