题 名:桂北兴安早奥陶世德Exigraptus和Glyptograptus并论列有轴笔石的起源(Early ordovician exigraptus and Glyptograptus from Xingan,N.Guangxi and the Orgin of Biseral Axonophorous Graptolites)
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作 者:陈旭(Chen-xu)
年卷期:1982年21卷5期
页 码:505-515
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