(22) Vega, M.M., Berthold, A., Clausen, H., Gingnagel, P., Fresno, A., Aycart, S., Ramos, C., Berggren, E., Tarazona, J.V. eds. (1998) Proceedings of the international workshop on hazard identification systems and the development of classification criteria for the terrestrial environment.
(22) Vega, M.M., Berthold, A., Clausen, H., Gingnagel, P., Fresno, A., Aycart, S., Ramos, C., Berggren, E., Tarazona, J.V. (dir.  publ.  ) (1998) Proceedings of the international workshop on hazard identification systems and the development of classification criteria for the terrestrial environment.