United States. Bureau of Labor Statistics. "Wages and Hours of Union Motortruck Drivers and Helpers, June 1, 1941 : Bulletin of the United States Bureau of Labor Statistics, No. 705," Union Wages and Hours : Local Truckdrivers and Helpers (June 1942). https://fraser.stlouisfed.org/title/3960/item/494912, accessed on August 6, 2024.