Extent of environmental contamination by naturally ocuring radioactive material (NORM) and technological options for mitigation - Vienna : International Atomic Energy Agency, 2003 - 198 p. : ill. ; 24 cm. - Technical reports series ; no. 419 . ISBN: 9201125038 Hadiah ISSN: 0074-1914 Subjects--Topical Terms: Radioactive substances--Safety measuresRadioactive substances--Environmental aspectsRadioactivity--Environmental aspectsRadiation, Background