Federal Reserve Bank of Philadelphia. "June 1966," Business Review (Federal Reserve Bank of Philadelphia) (June 1966). https://fraser.stlouisfed.org/title/5580/item/557452, accessed on March 29, 2024.
Federal Reserve Bank of Philadelphia. "June 1966," Business Review (Federal Reserve Bank of Philadelphia) (June 1966). https://fraser.stlouisfed.org/title/5580/item/557452, accessed on March 29, 2024.