United States. Bureau of Labor Statistics. Division of Industrial Relations
and United States. Bureau of Labor Statistics. "Labor-Management Contract Provisions, 1954. Prevalence and Characteristics of Selected Collective Bargaining Clauses : Bulletin of the United States Bureau of Labor Statistics, No. 1181,"
Labor-Management Contract Provisions
(1955).
https://fraser.stlouisfed.org/title/4489/item/495072, accessed on March 27, 2025.