1. SEASONAL FLUCTUATIONS IN THE PAST 5000 YEARS: STABLE ISOTOPE RECORD OF MOLLUSCAN SHELLS (BALATON REGION, HUNGARY). Authors: PÁL SÜMEGI, ISTVÁN FÓRIZS, GABRIELLA BARNA, ATTILA DEMÉNY.2. STABLE ISOTOPIC INVESTIGATIONS ON TRAVERTINES FROM THE GERECSE MOUNTAINS (HUNGARY). Authors: SÁNDOR KELE, ATTILA DEMÉNY, JÁNOS BORSODY.