United States. Bureau of Labor Statistics. "Union Wages and Hours: Motortruck Drivers and Helpers, July 1, 1947 : Bulletin of the United States Bureau of Labor Statistics, No. 928," Union Wages and Hours : Local Truckdrivers and Helpers (1948). https://fraser.stlouisfed.org/title/3960/item/494918, accessed on August 5, 2024.