Hoffman, Frederick L., 1865-1946
and United States. Bureau of Labor Statistics.
Mortality From Respiratory Diseases in Dusty Trades (Inorganic Dusts) : Bulletin of the United States Bureau of Labor Statistics, No. 231 ,
Washington, D.C:
Government Printing Office,
June 1918, https://fraser.stlouisfed.org/title/3865,
accessed on March 17, 2025.
@FedFRASER