United States. Women's Bureau. "The Employment of and Demand for Women Workers in the Manufacture of Instruments - Aircraft, Optical and Fire-Control, and Surgical and Dental : Women's Bureau Bulletin, No. 189-4" in Women's Employment in War Industries : Women's Bureau Bulletin, No. 189
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https://fraser.stlouisfed.org/title/5462/item/539650, accessed on November 7, 2024.