Occupational Wage Survey: Philadelphia, Pennsylvania, November 1960 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-24
United States. Bureau of Labor Statistics. "Occupational Wage Survey: Philadelphia, Pennsylvania, November 1960 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-24," Occupational Wage Survey (January 1961). https://fraser.stlouisfed.org/title/4510/item/495870, accessed on April 19, 2024.