United States. President and Council of Economic Advisers (U.S.). "Old-age, Survivors, and Disability Insurance Benefits," in United States. President and Council of Economic Advisers (U.S.). "1960," Economic Report of the President (1960) : 156-156. https://fraser.stlouisfed.org/title/45/item/8131/toc/270026 , accessed on March 28, 2024.