Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of application of Citibank Overseas Investment Corporation through Citibank Espana, S.A., to engage in execution and clearing of futures contracts" in Press Releases of the Board of Governors of the Federal Reserve System
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https://fraser.stlouisfed.org/title/9237/item/693358, accessed on January 14, 2026.