title: EVALUATION OF RADIATION SURVEILLANCE NETWORK EXTERNAL GAMMA RADIATION DATA, 1959-1963.
mesh_terms: D000397:Air Pollution; D000398:Air Pollution, Radioactive; D005720:Gamma Rays; D011834:Radiation Monitoring; D011847:Radioactive Fallout; D011851:Radioactivity
chemical_list: D011847:Radioactive Fallout
keywords: AIR POLLUTION, RADIOACTIVE; RADIATION MONITORING; RADIOACTIVE FALLOUT