Lewis, Richard H. , United States. Bureau of Labor Statistics and Winegarden, Calman R. (Calman Robert). Employment Opportunities for Welders : Bulletin of the United States Bureau of Labor Statistics, No. 844 , Washington, D.C: For sale by the Superintendent of Documents, U.S. Government Printing Office, 1945, https://fraser.stlouisfed.org/title/4313, accessed on February 18, 2025.