摘要
20041544 Chen Xiaohong (Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei); Wang Xiaofeng Elaborate Biostratigraphic Subdivision and Correlation of the Basal Da wan Stage (Middle Ordovi-cian) in Yangtze Platform, China (Acta Palaeontologica Sinica, ISSN 0001 - 6616, CN32-1188/Q, 42(3), 2003, p. 317-327, 4 illus. , 1 plate, 1 table, 34 refs. )
