Federal Reserve Bank of Philadelphia. "December 1969," Business Review (Federal Reserve Bank of Philadelphia) (December 1969). https://fraser.stlouisfed.org/title/5580/item/557495, accessed on March 28, 2024.
Federal Reserve Bank of Philadelphia. "December 1969," Business Review (Federal Reserve Bank of Philadelphia) (December 1969). https://fraser.stlouisfed.org/title/5580/item/557495, accessed on March 28, 2024.