United States. Bureau of Labor Statistics. Mobility of Molders and Coremakers, 1940-1952: A Study of the Work Experience, Training, and Personal Characteristics of Workers in a Skilled Occupation : Bulletin of the United States Bureau of Labor Statistics, No. 1162 , Washington: U.S. Govt. Print. Off., 1954, https://fraser.stlouisfed.org/title/4473, accessed on September 16, 2024.