Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 1, 1972 : Description and Sources of Data Plotted in the Weekly Series of Charts," H.13 Selected Interest and Exchange Rates, Weekly Series of Charts (January 1, 1972). https://fraser.stlouisfed.org/title/1077/item/45647, accessed on March 17, 2025.