Federal Reserve Bank of St. Louis. "Sparks Announces Retirement," in Federal Reserve Bank of St. Louis. "Bridges, Fall 2019," Bridges (Federal Reserve Bank of St. Louis) (December 19, 2019) : 16-16. https://fraser.stlouisfed.org/title/6272/item/601035/toc/581293 , accessed on May 6, 2024.