Safety of radiation sources and security of radioactive materials, proceedings of an Interantional Conference on the Safety of Radiation Sources and the Security of Radioactive Marterials : jointly organized by the European Commission ... [et al.] and held in Dijon, France 14-18 September 1998 - International Conference on the Safety of Radiation Sources and the Security of Radioactive Materials (1998 : Dijon, France); International Atomic Energy Agency; European Commission (Vienna : International Atomic Energy Agency, 1999)