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By "Zangerl, Rainer. "
Procolpochelys grandaeva (Leidy) : an early carettine sea turtle / by Rainer Zangerl and William D. Turnbull.
By: Zangerl, Rainer. - Turnbull, William D.
Publication info: Chicago, Ill. :Chicago Natural History Museum,1955.
Contributed by: University of Illinois Urbana Champaign