Board of Governors of the Federal Reserve System (U.S.), 1935-. "Approval of application of Minnesota Mining and Manufacturing Company for an exemption relating to nonbanking activities and acquisitions" in Press Releases of the Board of Governors of the Federal Reserve System
(May 9, 1972).
https://fraser.stlouisfed.org/title/9237/item/698626, accessed on January 17, 2026.