Federal Reserve Bank of San Francisco. "December 1968," Economic Review (Federal Reserve Bank of San Francisco) (December 1968). https://fraser.stlouisfed.org/title/869/item/520269, accessed on April 19, 2024.
Federal Reserve Bank of San Francisco. "December 1968," Economic Review (Federal Reserve Bank of San Francisco) (December 1968). https://fraser.stlouisfed.org/title/869/item/520269, accessed on April 19, 2024.