Federal Reserve Bank of Philadelphia. "October 1968," Business Review (Federal Reserve Bank of Philadelphia) (October 1968). https://fraser.stlouisfed.org/title/5580/item/557481, accessed on May 2, 2024.
Federal Reserve Bank of Philadelphia. "October 1968," Business Review (Federal Reserve Bank of Philadelphia) (October 1968). https://fraser.stlouisfed.org/title/5580/item/557481, accessed on May 2, 2024.