Board of Governors of the Federal Reserve System (U.S.), 1935-. "Revisions to the methodology for computing the Private Sector Adjustment Factor (PSAF) announced" in Press Releases of the Board of Governors of the Federal Reserve System
(June 16, 1989).
https://fraser.stlouisfed.org/title/9237/item/691585, accessed on September 6, 2026.