United States. Bureau of Labor Statistics. "Digest of 50 Selected Pension Plans for Salaried Employees, Summer 1965 : Bulletin of the United States Bureau of Labor Statistics, No. 1477," Digest of 50 Selected Pension Plans for Salaried Employees (1966). https://fraser.stlouisfed.org/title/4696/item/498152, accessed on September 11, 2024.