United States. Bureau of Labor Statistics. Health and Insurance Plans Under Collective Bargaining : Life Insurance and Accidental Death and Dismemberment Benefits, Early Summer 1960 : Bulletin of the United States Bureau of Labor Statistics, No. 1296 , Washington, D.C: G.P.O., June 1961, https://fraser.stlouisfed.org/title/4563, accessed on December 22, 2024.