An estimate of 237Np production during atmospheric testing.
D009405:Neptunium / Q000032:analysis*; D011847:Radioactive Fallout / Q000032:analysis*; D012990:Soil Pollutants, Radioactive / Q000032:analysis
D011847:Radioactive Fallout; D012990:Soil Pollutants, Radioactive; D009405:Neptunium