Federal Reserve Bank of Philadelphia. "May 1972," Business Review (Federal Reserve Bank of Philadelphia) (May 1972). https://fraser.stlouisfed.org/title/5580/item/557524, accessed on April 19, 2024.
Federal Reserve Bank of Philadelphia. "May 1972," Business Review (Federal Reserve Bank of Philadelphia) (May 1972). https://fraser.stlouisfed.org/title/5580/item/557524, accessed on April 19, 2024.