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  1. Additions to the mammalian fauna of Peru and notes on some other Peruvian mammals
    By: Pearson, O P
    Type: Article
    In: Breviora
    Volume: 73
    Date: 1957
    Page Range: 1--7
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  2. The tuco-tucos of Peru (genus Ctenomys)
    By: Sanborn, C C - Pearson, O P
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 60
    Date: 1947
    Page Range: 135--137
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