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  1. Redescription of type specimens of species of the Bryozoan genera Atactoporella, Homoptrypa, and Homotrypella from the Upper Ordovician Rocks of the Credit River Valley, Ontario, Canada /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1977.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Bryozoa, Fossil  Credit River Valley  Ontario  Ordovician  Paleontology  Type specimens  
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  2. Redescription of type specimens of the Bryozoan Heterotrypa from Upper Ordovician Rocks of the Credit River Valley, Ontario, Canada /
    By: Fritz, Madeleine A. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1975.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: Credit River Valley  Ontario  Ordovician  Paleontology  
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