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  1. The functional significance of the hypocercal tail and lateral fin fold of Anaspid ostracoderms / James A. Hopson --.
    By: Hopson, James A.
    Publication info: Chicago :Field Museum of Natural History,1974.
    Contributed by: University Library, University of Illinois Urbana Champaign
    Subjects: Anaspida  Fins (Anatomy)  Fishes  Locomotion  
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  2. The late Silurian anaspid genus Rhyncholepis from Oesel, Estonia, and Ringerike, Norway. American Museum novitates ; no. 2699
    By: Ritchie, Alexander.
    Publication info: New York, N.Y. : American Museum of Natural History 1980
    Contributed by: American Museum of Natural History Library
    Subjects: Anaspida  Estonia  Fishes, Fossil  Norway  Paleontology  Rhyncholepis  Ringerike  Saaremaa Island  Silurian  
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