United States. Department of the Treasury. "Cumulative Dividends, Interest and Distributions Report as of May 31, 2022," Dividends and Interest Report (June 10, 2022). https://fraser.stlouisfed.org/title/5152/item/619250, accessed on May 10, 2024.
United States. Department of the Treasury. "Cumulative Dividends, Interest and Distributions Report as of May 31, 2022," Dividends and Interest Report (June 10, 2022). https://fraser.stlouisfed.org/title/5152/item/619250, accessed on May 10, 2024.