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地质学报 1938
TheLowerSilurianTrilobiteEncrinurus(Coronocephalus)rex,itsGeographicalDistributionandStratigraphicalPositionAbstract: INTRODUCTIONIntheappendixofthe"StratigraphyofChina,"PartI,A.W.Grabau(4)~1figuredarestorationofaLowerSiluriantrilobiteunderthenewsubgenericname"Coronocephalus"onthebasisofseparated
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