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  1. The Poison-Organ Of The Sting-Ray (Trygon Pastinaca)
    By: Evans, H Muir
    Type: Article
    In: Proceedings of the Zoological Society of London.
    Volume: 1916
    Date: 1916
    Page Range: 431--440
    Publication info: London :Academic Press, [etc.],1833-1965.
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