title: [SOME PRINCIPAL PROBLEMS OF THE STANDARDIZATION OF RADIOACTIVE SUBSTANCES].
mesh_terms: D011835:Radiation Protection; D011868:Radioisotopes; D011874:Radiometry; D012015:Reference Standards; D012106:Research
chemical_list: D011868:Radioisotopes
keywords: EXPERIMENTAL LAB STUDY; RADIATION PROTECTION; RADIOISOTOPES; RADIOMETRY
vernacular_title: NEKOTORYE PRINTSIPIAL'NYE VOPROSY NORMIROVANIIA RADIOAKTIVNYKH VESHCHESTV.