Occupational Wage Survey: Allentown-Bethlehem-Easton, Pennsylvania-New Jersey, February 1961 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-47
United States. Bureau of Labor Statistics. "Occupational Wage Survey: Allentown-Bethlehem-Easton, Pennsylvania-New Jersey, February 1961 : Bulletin of the United States Bureau of Labor Statistics, No. 1285-47," Occupational Wage Survey (April 1961). https://fraser.stlouisfed.org/title/4510/item/495895, accessed on April 19, 2024.