United States. Bureau of Labor Statistics. "Union Scales of Wages and Hours in the Building Trades in 70 Cities, May 15, 1937 : Bulletin of the United States Bureau of Labor Statistics, No. 657," Union Wages and Hours in the Building Trades (April 1938). https://fraser.stlouisfed.org/title/4200/item/494435, accessed on April 26, 2025.
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