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  1. Comparative microscopic dental anatomy in the Petalodontida (Chondrichthyes, Elasmobranchii) / Rainer Zangerl --, H. Frank Winter --, Michael C. Hansen --.
    By: Zangerl, Rainer, - Hansen, Michael C. - Winter, H. Frank.
    Publication info: [Chicago, Ill.] :Field Museum of Natural History,1993.
    Contributed by: University of Illinois Urbana Champaign
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