https://www.cdc.gov/niosh/welding/about/
Welding Fumes and Manganese | Welding | CDC
Describes occupational exposure of manganese due to welding fumes.
welding fumesmanganesecdc
https://www.hse.gov.uk/copd/casestudies/welding2.htm
Workers concerned about welding fumes - HSE
HSE - Chronic obstructive pulmonary disease - Workers concerned about welding fumes
welding fumesworkersconcernedhse
https://www.cdc.gov/niosh-rtecs/ZC26E8F0.html
RTECS:ZC2550000 - Welding fumes - The Registry of Toxic Effects of Chemical Substances | CDC/NIOSH
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