United States. Bureau of Labor Statistics. "Digest of 50 Selected Pension Plans for Salaried Employees, Spring 1963 : Bulletin of the United States Bureau of Labor Statistics, No. 1373," Digest of 50 Selected Pension Plans for Salaried Employees (1963). https://fraser.stlouisfed.org/title/4696/item/497805, accessed on September 20, 2024.