Federal Reserve Bank of Philadelphia. "March/April 1981," Business Review (Federal Reserve Bank of Philadelphia) (March/April 1981). https://fraser.stlouisfed.org/title/5580/item/557597, accessed on April 25, 2024.
Federal Reserve Bank of Philadelphia. "March/April 1981," Business Review (Federal Reserve Bank of Philadelphia) (March/April 1981). https://fraser.stlouisfed.org/title/5580/item/557597, accessed on April 25, 2024.