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Sha, J.-G. (1992). Ontogenetic variations of the Early Cretaceous non-marine bivalve Trigonioides (T.) heilongjiangensis and the concept of fossil species. Paläontologische Zeitschrift. 66(3-4): 241-264.
Sha, J.-G. (1992). Ontogenetic variations of the Early Cretaceous non-marine bivalve Trigonioides (T.) heilongjiangensis and the concept of fossil species. Paläontologische Zeitschrift. 66(3-4): 241-264.
