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Zhang, 1977. In Hubei Sheng Dizhi Kexue Yanjiusuo et al. [Hubei Province Institute of Geology et al.], Zhongnan diqu gushengwu tuce.2. Wan gusheng dai bufen.[Fossils of central and southern China. Vol.2. Late Palaeozoic.] Dizhi Chuban Sh [Geological Press. |