Occupational Wage Survey: Allentown-Bethlehem-Easton, Pennsylvania-New Jersey, February 1965 : Bulletin of the United States Bureau of Labor Statistics, No. 1430-48
United States. Bureau of Labor Statistics. "Occupational Wage Survey: Allentown-Bethlehem-Easton, Pennsylvania-New Jersey, February 1965 : Bulletin of the United States Bureau of Labor Statistics, No. 1430-48," Occupational Wage Survey (1965). https://fraser.stlouisfed.org/title/4510/item/497997, accessed on April 25, 2024.