Coin Production at new Philadelphia Mint reaches 8 million pieces daily, December 23, 1969
United States. Department of the Treasury. "Coin Production at new Philadelphia Mint reaches 8 million pieces daily, December 23, 1969," in United States. Department of the Treasury. "Volume 167," Press Releases of the United States Department of the Treasury (November 7, 1969 - January 30, 1970) : 283-285. https://fraser.stlouisfed.org/title/6111/item/587010/toc/541623 , accessed on June 23, 2024.