12Th International Conference on Solid State Ionics, Date: JUN 06-12, 1999, Location: HALKIDIKI, GREECE, Sponsors: Minist Cultural Affairs, Minist Educ, Minist Macedonia & Thrace, Gen Secretariat Res & Technol, Univ Patras, Res Comm, Aristotle Univ Thessaloniki, Univ Thessaly, Patras Sci Pk, Chem Process Engn Res Inst, Natl Bank Greece, Commercial Bank Greece, Agr Bank Greece, Athenian Brewry SA, Patras Plant, LPC Hellas, Leader Books SA, GlaxoWellcome, George P Vasilopoulos SA, Hlthcon Ltd, Energizer, ONR, Elefctrochem Soc, High Temperature Mat Div