United States. Bureau of Labor Statistics. "Wages and Hours of Union Motortruck Drivers and Helpers, June 1, 1942 : Bulletin of the United States Bureau of Labor Statistics, No. 732," Union Wages and Hours : Local Truckdrivers and Helpers (1943). https://fraser.stlouisfed.org/title/3960/item/494913, accessed on August 6, 2024.