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