United States. Department of the Treasury. "Cumulative Dividends, Interest and Distributions Report as of April 30, 2018," Dividends and Interest Report (May 10, 2018). https://fraser.stlouisfed.org/title/5152/item/578060, accessed on May 9, 2024.
United States. Department of the Treasury. "Cumulative Dividends, Interest and Distributions Report as of April 30, 2018," Dividends and Interest Report (May 10, 2018). https://fraser.stlouisfed.org/title/5152/item/578060, accessed on May 9, 2024.