Federal Reserve Bank of San Francisco. "The Western Year," Economic Letter (Federal Reserve Bank of San Francisco) (January 17, 1975). https://fraser.stlouisfed.org/title/4960/item/527182, accessed on May 21, 2022.
Federal Reserve Bank of San Francisco. "The Western Year," Economic Letter (Federal Reserve Bank of San Francisco) (January 17, 1975). https://fraser.stlouisfed.org/title/4960/item/527182, accessed on May 21, 2022.