Improved interest rates on new purchases of Series E and H Savings Bonds, April 20, 1957
United States. Department of the Treasury. "Improved interest rates on new purchases of Series E and H Savings Bonds, April 20, 1957," in United States. Department of the Treasury. "Volume 109," Press Releases of the United States Department of the Treasury (January 3, 1957 - April 30, 1957) : 355-364. https://fraser.stlouisfed.org/title/6111/item/586952/toc/537357 , accessed on June 25, 2024.