United States. Bureau of Labor Statistics. "Industry Wage Survey: Pressed or Blown Glass and Glassware, May 1975 : Bulletin of the United States Bureau of Labor Statistics, No. 1923," Industry Wage Survey: Pressed or Blown Glass and Glassware (1976). https://fraser.stlouisfed.org/title/4626/item/499293, accessed on March 21, 2025.