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Yu, J.-S.; Yao, P.-Y. (1986). New Material of Non-Marine Bivalves from the Nantianmen Group in Wanquan County, Hebei. Professional Papers of Stratigraphy and Palaeontology. 15: 190-218.
Yu, J.-S.; Yao, P.-Y. (1986). New Material of Non-Marine Bivalves from the Nantianmen Group in Wanquan County, Hebei. Professional Papers of Stratigraphy and Palaeontology. 15: 190-218.
