United States. Bureau of Labor Statistics. "Annual Earnings and Employment Patterns of Private Nonagricultural Employees, 1971 and 1972 : Bulletin of the United States Bureau of Labor Statistics, No. 1928," Annual Earnings and Employment Patterns, Private Nonagricultural Employment (1976). https://fraser.stlouisfed.org/title/4653/item/499297, accessed on September 26, 2024.