Federal Reserve Bank of Philadelphia. "October 1961," Business Review (Federal Reserve Bank of Philadelphia) (October 1961). https://fraser.stlouisfed.org/title/5580/item/557396, accessed on May 2, 2024.
Federal Reserve Bank of Philadelphia. "October 1961," Business Review (Federal Reserve Bank of Philadelphia) (October 1961). https://fraser.stlouisfed.org/title/5580/item/557396, accessed on May 2, 2024.