United States. Bureau of Labor Statistics. "Union Wages and Hours: Motortruck Drivers and Helpers, July 1, 1948 : Bulletin of the United States Bureau of Labor Statistics, No. 955," Union Wages and Hours : Local Truckdrivers and Helpers (1949). https://fraser.stlouisfed.org/title/3960/item/494919, accessed on November 17, 2024.