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 13, 2006 : Federal Register Notice" in Citizens Coinage Advisory Committee Meetings, Recommendations, and Minutes (April 13, 2006). https://fraser.stlouisfed.org/title/7136/item/646822/content/pdf/ccac20060413notice, accessed on December 9, 2023.