International Association of Industrial Accident Boards and Commissions , Grinding Wheel Manufacturers Association of the United States and Canada , American Standards Association and United States. Bureau of Labor Statistics. Safety Code for the Use, Care, and Protection of Abrasive Wheels : Bulletin of the United States Bureau of Labor Statistics, No. 527 , Washington: U.S. Govt. Print. Off., December 1930, https://fraser.stlouisfed.org/title/4081, accessed on December 30, 2024.