title: [Radioactive and radiation standards. (1) Radioactive standards and their use (author's transl)].
mesh_terms: D005214:Fast Neutrons; D009502:Neutrons; D011827:Radiation; D011829:Radiation Dosage; D011851:Radioactivity; D011874:Radiometry / Q000592:standards; D012015:Reference Standards; D014894:Weights and Measures / Q000592:standards