U.S. and Sri Lanka Sign Protocol To Income Tax Treaty, September 25, 1991, Release Number nb-1471
United States. Department of the Treasury. "U.S. and Sri Lanka Sign Protocol To Income Tax Treaty, September 25, 1991, Release Number nb-1471," in United States. Department of the Treasury. "Volume 310," Press Releases of the United States Department of the Treasury (September 11, 1991 - October 15, 1991) : 254-255. https://fraser.stlouisfed.org/title/6111/item/587153/toc/546205 , accessed on May 24, 2024.