Occupational Wage Survey: Wilmington, Delaware-New Jersey, September 1960 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-12
United States. Bureau of Labor Statistics. "Occupational Wage Survey: Wilmington, Delaware-New Jersey, September 1960 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-12," Occupational Wage Survey (December 1960). https://fraser.stlouisfed.org/title/4510/item/495857, accessed on April 24, 2024.