Board of Governors of the Federal Reserve System (U.S.), 1935-. "Final report of a Federal Reserve committee study of payments services provided to depository institutions : Attachment 1" in Press Releases of the Board of Governors of the Federal Reserve System
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https://fraser.stlouisfed.org/title/9237/item/674573/content/pdf/frsbog_pr_19980105-1, accessed on April 16, 2026.