U.S. Income Tax Conventions with Trinidad and Tobago and with Canada enter into force, December 22, 1967, Release Number f-1111
United States. Department of the Treasury. "U.S. Income Tax Conventions with Trinidad and Tobago and with Canada enter into force, December 22, 1967, Release Number f-1111," in United States. Department of the Treasury. "Volume 160," Press Releases of the United States Department of the Treasury (December 1, 1967 - February 29, 1968) : 77-79. https://fraser.stlouisfed.org/title/6111/item/587003/toc/540916 , accessed on July 9, 2024.