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  1. By: Pas, Jorik van der - Poppe, Linda - Waveren, I. M. van (Isabel Maria),
    Type: Article
    In: PhytoKeys
    Volume: 88
    Date: 2017
    Page Range: 123-149
    Publication Info: Sofia, Bulgaria Pensoft Publishers [2010]-
    Subjects: Carboniferous  Dicranophyllales  Early conifers  Permian