Emergency Preparedness for Radiological Accidents: The Issue of Potassium Iodide : Oversight Hearing Before the Subcommittee on Oversight and Investigations of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-seventh Congress, Second Session, on Emergency Preparedness for Radiological Accidents, the Issue of Potassium Iodide, Hearing Held in Washington, D.C., March 5, 1982