Summary tables, Employment of Covered Workers and Wages Earned in Covered Employment
United States. Bureau of Employment Security. "Summary tables, Employment of Covered Workers and Wages Earned in Covered Employment," in United States. Bureau of Employment Security. "Employment Security Memorandum, No. 17," Employment and Pay Rolls in State Unemployment Compensation Systems, 1938 (1939) : 70-106. https://fraser.stlouisfed.org/title/193/item/5443/toc/208018 , accessed on April 23, 2024.