United States. Bureau of Labor Statistics. Division of Occupational Outlook. Analysis of Layoff, Recall, and Work-Sharing Procedures in Union Contracts : Bulletin of the United States Bureau of Labor Statistics, No. 1209 , Washington: U.S. Govt. Print. Off., March 1957, https://fraser.stlouisfed.org/title/4499, accessed on October 7, 2024.