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  1. Phylogeny of the chelydrid turtles : a study of shared derived characters in the skull / Eugene S. Gaffney --.
    By: Gaffney, Eugene S.
    Publication info: Chicago :Field Museum of Natural History,1975.
    Contributed by: University of Illinois Urbana Champaign
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  2. A revision of the chelonian genus Bothremys (Pleurodira: Pelomedusidae) / Eugene S. Gaffney -- and Rainer Zangerl --.
    By: Gaffney, Eugene S. - Leibhardt, Maidi Wiebe - Zangerl, Rainer,
    Publication info: [Chicago] :Field Museum of Natural History,1968.
    Contributed by: University of Illinois Urbana Champaign
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