title: Air surveillance Network, December 1972.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D004583:Electrons; D004781:Environmental Exposure; D011834:Radiation Monitoring; D011847:Radioactive Fallout; D011851:Radioactivity; D014481:United States
chemical_list: D011847:Radioactive Fallout