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Hsü, S. C.; Ma, C. T. (1948). The I-Chang Formation and the Ichangian fauna. Contributions from the National Research Institute of Geology, Academia Sinica. 8: 1-51.
Hsü, S. C.; Ma, C. T. (1948). The I-Chang Formation and the Ichangian fauna. Contributions from the National Research Institute of Geology, Academia Sinica. 8: 1-51.
