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