United States. General Accounting Office and United States. Government Accountability Office. "U.S. Currency : Financial Benefit of Switching to a $1 Coin Is Unlikely, but Changing Coin Metal Content Could Result in Cost Savings, Report to the Chairman, Committee on the Budget, U.S. Senate" in GAO Reports & Testimonies (March 21, 2019). https://fraser.stlouisfed.org/title/6136/item/622293, accessed on March 22, 2025.