Federal Reserve Bank of New York. "4971. Preliminary Figures on Current Exchange Offering, 4 Percent Treasury Bonds of 1969, Additional Issue, for Series F and G Savings Bonds Maturing in 1961,"
Federal Reserve Bank of New York Circulars
(December 6, 1960).
https://fraser.stlouisfed.org/title/466/item/12485, accessed on March 14, 2026.