Federal Reserve Bank of Philadelphia. "May/June 1981," Business Review (Federal Reserve Bank of Philadelphia) (May/June 1981). https://fraser.stlouisfed.org/title/5580/item/557598, accessed on April 24, 2024.
Federal Reserve Bank of Philadelphia. "May/June 1981," Business Review (Federal Reserve Bank of Philadelphia) (May/June 1981). https://fraser.stlouisfed.org/title/5580/item/557598, accessed on April 24, 2024.