Industry Wage Survey: Industrial Chemicals, June 1971 : Bulletin of the United States Bureau of Labor Statistics, No. 1768
United States. Bureau of Labor Statistics. "Industry Wage Survey: Industrial Chemicals, June 1971 : Bulletin of the United States Bureau of Labor Statistics, No. 1768," Industry Wage Survey: Industrial Chemicals (1973). https://fraser.stlouisfed.org/title/4604/item/498905, accessed on April 23, 2024.