[Radioactive and radiation standards (VIII), 7. Standard sources for environmental radioactivity measurement, (1) radioactive standard sources for gamma-ray spectrometry (author's transl)].
D000398:Air Pollution, Radioactive / Q000032:analysis; D005857:Germanium / Q000032:analysis; D013051:Spectrometry, Gamma / Q000592:standards*
D005857:Germanium