Hamilton, Alice, 1869-1970 and United States. Bureau of Labor Statistics. Industrial Poisoning in Making Coal-Tar Dyes and Dye Intermediates : Bulletin of the United States Bureau of Labor Statistics, No. 280 , Washington, D.C: Government Printing Office, April 1921, https://fraser.stlouisfed.org/title/3892, accessed on February 14, 2025.