Federal Reserve Bank of San Francisco. "Feet of Clay?," Economic Letter (Federal Reserve Bank of San Francisco) (February 1, 1974). https://fraser.stlouisfed.org/title/4960/item/527132, accessed on March 29, 2024.
Federal Reserve Bank of San Francisco. "Feet of Clay?," Economic Letter (Federal Reserve Bank of San Francisco) (February 1, 1974). https://fraser.stlouisfed.org/title/4960/item/527132, accessed on March 29, 2024.