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  1. Radiation Basics (Environmental Protection Agency) - PDF  
    Radiation Exposure/Start Here ... Radiation Exposure ... Environmental Protection Agency ... PDF ... Radiation can come from unstable atoms or it can be produced by machines. ...
    https://www.epa.gov/radiation/radiation-basics - External Health Links
  2. Eye Protection (National Farm Medicine Center) - PDF  
    Eye Care/Prevention and Risk Factors ... Eye Care ... National Farm Medicine Center ... PDF
    https://www.marshfieldresearch.org/.../NFMC/PDFs/EyeProtection.2.pdf - External Health Links