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  1. Diplocaulus : a study in growth and variation / Everett Claire Olson --
    By: Olson, Everett Claire, - Ross, Lillian A. - Roy, Sharat Kumar,
    Publication info: [Chicago] :Chicago Natural History Museum Press ,1951.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Diplocaulus  
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  2. Fauna of the upper Vale and Choza : 6, Diplocaulus / Everett Claire Olson --
    By: Olson, Everett Claire,
    Publication info: Chicago :Chicago Natural History Museum,1952.
    Contributed by: Field Museum Library
    Subjects: Diplocaulus  Paleontology  Permian  Texas  
    BHL Collections: Field Museum Library
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