United States. Bureau of Labor Statistics and Pennsylvania Railroad. Joint Fact Finding Committee. Pennsylvania Railroad Wage Data: From Report of Joint Fact Finding Committee in Wage Negotiations, 1927 : Bulletin of the United States Bureau of Labor Statistics, No. 514 , Washington: U.S. Govt. Print. Off., March 1930, https://fraser.stlouisfed.org/title/4075, accessed on November 15, 2024.