Federal Reserve Bank of New York. "4523. Chain-Letter Scheme Using Savings Bonds," Federal Reserve Bank of New York Circulars (October 25, 1957). https://fraser.stlouisfed.org/title/466/item/11961, accessed on May 4, 2024.
Federal Reserve Bank of New York. "4523. Chain-Letter Scheme Using Savings Bonds," Federal Reserve Bank of New York Circulars (October 25, 1957). https://fraser.stlouisfed.org/title/466/item/11961, accessed on May 4, 2024.