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2. Exposure from Natural Sources of Radiation, 1993 Report to the General Assembly, Annex A, United Nations, New York;UNSCEAR (United Nations Scientific Committee on the Effects of Atomic Radiation),1993
3. Spatial distribution of natural and artificial radionuclides at the catchment scale (South Central Pyrenees);Navas;Radiat. Meas.,2011
4. Basics of Environmental Gamma-Spectrometry;Kogan,1976
5. Nuclear Geochemistry;Titaeva,2000