Introduction
United States. Bureau of Employment Security. "Introduction," in United States. Bureau of Employment Security. "Employment Security Memorandum, No. 17," Employment and Pay Rolls in State Unemployment Compensation Systems, 1938 (1939) : 14-43. https://fraser.stlouisfed.org/title/193/item/5443/toc/208028 , accessed on May 21, 2024.