PROCEEDINGS OF THE : 30TH INTERNATIONAL GEOLOGICAL CONGRESS, 4 - 14 AUGUST, BEIJING, CHINA. by International Geological Congress (30th : 1996 : Beijing, China), organiser, Zhaocai, Sun, editor 635654, Tinbin, Wang, editor 635655, Deliao, Ye, editor 635656, Guojin, Song, editor 635658