Stiles, Lynn A. "Rx for Unemployment : Economic Expansion, Structural Changes, or Both?," in Federal Reserve Bank of Chicago. "December 1963," Business Conditions (Federal Reserve Bank of Chicago) (December 1963) : 2-7. https://fraser.stlouisfed.org/title/5562/item/540210/toc/520639 , accessed on May 10, 2024.