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 May 9, 2025.
@FedFRASER