United States. Department of the Treasury. "Bill offering on 274-day bills and 366 day bills, July 19, 1967," in United States. Department of the Treasury. "Volume 158," Press Releases of the United States Department of the Treasury (June 1, 1967 - August 29, 1967) : 346-348. https://fraser.stlouisfed.org/title/6111/item/587001/toc/540766 , accessed on May 18, 2024.