Board of Governors of the Federal Reserve System (U.S.), 1935-. "Financial Assets of Pension Funds," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1980-1989," Annual Statistical Digest (March 1991) : 683-683. https://fraser.stlouisfed.org/title/7/item/23495/toc/414340 , accessed on May 5, 2024.