Report Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 1999. Høiskar, B.A.K.; Braathen, G.O.; Dahlback, A.; Bojkov, B.R.; Svenøe, T.; Edvardsen, K.; Hansen, G.H. Publication details Series: NILU OR 26/2000 Publisher: NILU Year: 2000 ISBN: 82-425-1180-2