United States. Bureau of the Mint. "2014 Biennial Report to the Congress : 2014 Biennial Report to the Congress,"
Biennial Report to the Congress as required by The Coin Modernization, Oversight, and Continuity Act of 2010 (Public Law 111-302)
(December 2014).
https://fraser.stlouisfed.org/title/9414/item/687740/content/pdf/usmint_2014-Biennial-Report, accessed on August 19, 2026.