United States. Department of the Treasury. "Legislation on Environmental Financing Authority, February 10, 1971," in United States. Department of the Treasury. "Volume 172," Press Releases of the United States Department of the Treasury (February 1, 1971 - March 31, 1971) : 98-112. https://fraser.stlouisfed.org/title/6111/item/587015/toc/542112 , accessed on May 4, 2024.