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  1. On the nature of the holotype of Nipterella paradoxica (Billings) / [by] Matthew H. Nitecki --
    By: Nitecki, Matthew H.
    Publication info: [Chicago] :Field Museum of Natural History,1968.
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Mingan Islands  Nipterella paradoxica  Ordovician  Paleontology  Québec (Province)  
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