United States. Bureau of Labor Statistics. "Union Wages, Hours, and Working Conditions in the Printing Trades, June 1, 1939 : Bulletin of the United States Bureau of Labor Statistics, No. 675," Union Wages and Hours : Printing Trades (June 1, 1939). https://fraser.stlouisfed.org/title/3961/item/494363, accessed on September 11, 2024.