United States. Bureau of Labor Statistics.
Subject Index to the Monthly Labor Review, Volumes 1 to 11, July 1915 to December 1920 : Bulletin of the United States Bureau of Labor Statistics, No. 695 ,
Washington, DC:
U.S. G.P.O,
1941, https://fraser.stlouisfed.org/title/5264,
accessed on December 19, 2025.