PROGRAM BOOK 28th International Geological Congress 30th international Geological Congress Abstracts 1996 30th international Geological Congress Programme 1996 Abstracts 28th International Geological Congress Volume 1 of 3 Abstracts 28th International Geological Congress Volume 3 of 3 Abstracts 28th International Geological Congress volume 2 of 3 International economics digest International Business International communication International Communication