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Chen, J.-H. (1990). On the attribution of Trigonioides yunnanensis Ku et Ma. Acta Palaeontologica Sinica. 29(2): 183-192.
Chen, J.-H. (1990). On the attribution of Trigonioides yunnanensis Ku et Ma. Acta Palaeontologica Sinica. 29(2): 183-192.