Stratigraphic, isotopic and chemical profiles of a firn core from Drygalski ice tongue and of a snow pit from Aviator Glacier (Northern Victoria Land, Antarctica) - CAPRIOLI R; DELLA VEDOVA A. M; GRAGNANI R; GRIGIONI P; MAGGI V; SERRA F; STENNI, Barbara; TORCINI S. (Giuseppe Orombelli, 1997)