United States. Department of the Treasury. "Costanzo to be nominated for Mint's New York Assay Post, June 25, 1969," in United States. Department of the Treasury. "Volume 165," Press Releases of the United States Department of the Treasury (May 6, 1969 - August 29, 1969) : 248-249. https://fraser.stlouisfed.org/title/6111/item/587008/toc/541474 , accessed on June 22, 2024.