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 20, 2021 : Federal Register Notice" in Citizens Coinage Advisory Committee Meetings, Recommendations, and Minutes (April 20, 2021). https://fraser.stlouisfed.org/title/7136/item/646828/content/pdf/ccac20210420notice, accessed on June 6, 2026.