Federal Reserve Bank of Philadelphia. "January/February 1987," Business Review (Federal Reserve Bank of Philadelphia) (January/February 1987). https://fraser.stlouisfed.org/title/5580/item/557632, accessed on April 25, 2024.
Federal Reserve Bank of Philadelphia. "January/February 1987," Business Review (Federal Reserve Bank of Philadelphia) (January/February 1987). https://fraser.stlouisfed.org/title/5580/item/557632, accessed on April 25, 2024.