United States. Bureau of Labor Statistics. Division of Occupational Outlook. "Earnings and Supplementary Benefits in Hospitals, Chicago, Illinois, August 1956 : Bulletin of the United States Bureau of Labor Statistics, No. 1210-5,"
Industry Wage Survey: Hospitals
(May 1957).
https://fraser.stlouisfed.org/title/4567/item/495707, accessed on March 5, 2025.
@FedFRASER