United States. Bureau of Labor Statistics. "Union Wages, Hours, and Working Conditions in the Building Trades, June 1, 1939 : Bulletin of the United States Bureau of Labor Statistics, No. 674," Union Wages and Hours in the Building Trades (June 1, 1939). https://fraser.stlouisfed.org/title/4200/item/494437, accessed on September 11, 2024.