International Association of Industrial Accident Boards and Commissions , Grinding Wheel Manufacturers Association and American Engineering Standards Committee. Safety Code for the Use, Care, and Protection of Abrasive Wheels : Bulletin of the United States Bureau of Labor Statistics, No. 436 , Washington, D.C: G.P.O., March 1927, https://fraser.stlouisfed.org/title/4041, accessed on December 20, 2024.