United States. Department of the Treasury. "Philippine Quotas, May 12, 1967, Release Number f-916," in United States. Department of the Treasury. "Volume 157," Press Releases of the United States Department of the Treasury (March 1, 1967 - May 31, 1967) : 628-629. https://fraser.stlouisfed.org/title/6111/item/587000/toc/540600 , accessed on June 2, 2024.