Federal Reserve Bank of San Francisco. "March 1968," Economic Review (Federal Reserve Bank of San Francisco) (March 1968). https://fraser.stlouisfed.org/title/869/item/520260, accessed on May 4, 2024.
Federal Reserve Bank of San Francisco. "March 1968," Economic Review (Federal Reserve Bank of San Francisco) (March 1968). https://fraser.stlouisfed.org/title/869/item/520260, accessed on May 4, 2024.