Federal Reserve Bank of Philadelphia. "December 1957," Business Review (Federal Reserve Bank of Philadelphia) (December 1957). https://fraser.stlouisfed.org/title/5580/item/557350, accessed on April 19, 2024.
Federal Reserve Bank of Philadelphia. "December 1957," Business Review (Federal Reserve Bank of Philadelphia) (December 1957). https://fraser.stlouisfed.org/title/5580/item/557350, accessed on April 19, 2024.