Federal Reserve Bank of Philadelphia. "June 1970," Business Review (Federal Reserve Bank of Philadelphia) (June 1970). https://fraser.stlouisfed.org/title/5580/item/557501, accessed on April 23, 2024.
Federal Reserve Bank of Philadelphia. "June 1970," Business Review (Federal Reserve Bank of Philadelphia) (June 1970). https://fraser.stlouisfed.org/title/5580/item/557501, accessed on April 23, 2024.