Board of Governors of the Federal Reserve System (U.S.), 1935-. "Joint Treasury and Federal Reserve report on use and counterfeiting of U.S. currency abroad released to the Congress : Release" in Press Releases of the Board of Governors of the Federal Reserve System
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https://fraser.stlouisfed.org/title/9237/item/674324/content/pdf/frsbog_pr_20000229a, accessed on September 4, 2026.