United States. Bureau of Labor Statistics. "Union Wages and Hours: Printing Industry, January 2, 1948, and July 1, 1949 : Bulletin of the United States Bureau of Labor Statistics, No. 979," Union Wages and Hours : Printing Trades (1950). https://fraser.stlouisfed.org/title/3961/item/494933, accessed on May 9, 2025.
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