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  1. Snakes of the Peruvian coastal region, by Karl P. Schmidt and Warren F. Walker.
    By: Schmidt, Karl Patterson, - Walker, Warren F.
    Publication info: Chicago,1943.
    Contributed by: University of Illinois Urbana Champaign
    View Book
  2. Three new snakes from the Peruvian Andes, by Karl P. Schmidt and Warren F. Walker.
    By: Schmidt, Karl Patterson, - Walker, Warren F.
    Publication info: Chicago,1943.
    Contributed by: University of Illinois Urbana Champaign
    View Book