United States. Bureau of Labor Statistics. "Union Wages and Benefits: Local Truckdrivers and Helpers, September 3, 1979 : Bulletin of the United States Bureau of Labor Statistics, No. 2089," Union Wages and Hours : Local Truckdrivers and Helpers (1981). https://fraser.stlouisfed.org/title/3960/item/499641, accessed on September 4, 2024.