Occupational Wage Survey: Philadelphia, Pennsylvania-New Jersey, November 1964 : Bulletin of the United States Bureau of Labor Statistics, No. 1430-28
United States. Bureau of Labor Statistics. "Occupational Wage Survey: Philadelphia, Pennsylvania-New Jersey, November 1964 : Bulletin of the United States Bureau of Labor Statistics, No. 1430-28," Occupational Wage Survey (1965). https://fraser.stlouisfed.org/title/4510/item/497977, accessed on April 19, 2024.