Report Measurement of radioactivity in Norway, Annual report for 1989. Berg, T. C. Publication details Series: NILU OR 69/90 Publisher: NILU Year: 1990 ISBN: 82-425-0199-8 File: NILU OR 69/90 (pdf) Link: http://urn.nb.no/URN:NBN:no-nb_digibok_2009071701027