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On the Morphological Complexity of the Graptolite Tubaria in the Darriwilian(Middle Ordovician)
Authors:MA Xuan and ZHANG Yuandong
Affiliation:1 University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, P.R. China2 CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing, P.R. China and 1 University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, P.R. China2 CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing, P.R. China
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