United States. Bureau of Labor Statistics
, American Foundrymen's Society
and American Standards Association.
Safety Code for the Protection of Industrial Workers in Foundries : Bulletin of the United States Bureau of Labor Statistics, No. 336 ,
Washington, D.C:
G.P.O.,
April 1923, https://fraser.stlouisfed.org/title/3985,
accessed on November 7, 2024.