Keran, Michael W. (Michael William), 1931-. "Summary of U.S. Balance of Payments, 1969," in Federal Reserve Bank of St. Louis. "April 1970," Review (Federal Reserve Bank of St. Louis) (April 1970) : 26-27. https://fraser.stlouisfed.org/title/820/item/24266/toc/499350 , accessed on April 19, 2024.