Federal Reserve Bank of Philadelphia. "May 1969," Business Review (Federal Reserve Bank of Philadelphia) (May 1969). https://fraser.stlouisfed.org/title/5580/item/557488, accessed on March 28, 2024.
Federal Reserve Bank of Philadelphia. "May 1969," Business Review (Federal Reserve Bank of Philadelphia) (May 1969). https://fraser.stlouisfed.org/title/5580/item/557488, accessed on March 28, 2024.