United States. Department of the Treasury. "Monthly bill results (339-day bills), June 26, 1973," in United States. Department of the Treasury. "Volume 184," Press Releases of the United States Department of the Treasury (April 27, 1973 - June 29, 1973) : 989-990. https://fraser.stlouisfed.org/title/6111/item/587027/toc/543306 , accessed on June 25, 2024.