United States. Office of Management and Budget. "Budget Authority by Agency and by Subfunction," in United States. Office of Management and Budget. "Fiscal Year 2015," Historical Tables, Budget of the United States Government (March 10, 2014) : 99-138. https://fraser.stlouisfed.org/title/383/item/6441/toc/137777 , accessed on May 3, 2024.