Federal Reserve Bank of San Francisco. "Why Silver?," Economic Letter (Federal Reserve Bank of San Francisco) (April 12, 1974). https://fraser.stlouisfed.org/title/4960/item/527142, accessed on May 3, 2024.
Federal Reserve Bank of San Francisco. "Why Silver?," Economic Letter (Federal Reserve Bank of San Francisco) (April 12, 1974). https://fraser.stlouisfed.org/title/4960/item/527142, accessed on May 3, 2024.