Federal Reserve Bank of San Francisco. "1961 Index," Economic Review (Federal Reserve Bank of San Francisco) (1961). https://fraser.stlouisfed.org/title/869/item/33464, accessed on March 29, 2024.
Federal Reserve Bank of San Francisco. "1961 Index," Economic Review (Federal Reserve Bank of San Francisco) (1961). https://fraser.stlouisfed.org/title/869/item/33464, accessed on March 29, 2024.