United States. Department of the Treasury. "Cotton, April 13, 1961," in United States. Department of the Treasury. "Volume 124," Press Releases of the United States Department of the Treasury (January 24, 1961 - April 27, 1961) : 470-473. https://fraser.stlouisfed.org/title/6111/item/586967/toc/538443 , accessed on June 23, 2024.