ASSESSMENT OF THE VOLUME ACTIVITY OF Α-RADIOACTIVE WASTES ON SURFACE AND SPECIFIC CONTAMINATION BY PORTABLE Γ-SPECTROMETRY METHOD Статья Korenkov I.P., Ermakov A.I., Mayzik A.B., Laschenova T.N., Klochkov V.N., Bushmanov A.Yu. Meditsina Truda I Promyshlennaya Ekologiya. Том 60. 2020. С. 468-473