Federal Reserve Bank of Philadelphia. "February 1961," Business Review (Federal Reserve Bank of Philadelphia) (February 1961). https://fraser.stlouisfed.org/title/5580/item/557388, accessed on March 28, 2024.
Federal Reserve Bank of Philadelphia. "February 1961," Business Review (Federal Reserve Bank of Philadelphia) (February 1961). https://fraser.stlouisfed.org/title/5580/item/557388, accessed on March 28, 2024.