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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Steffen, Mart R. (Martin Robert), - Steffen, Martin Robert,
    Publication info: Chicago, Ill, American journal of veterinary medicine, 1916
    Holding Institution: Multiple institutions
  2. By: Steffen, Mart R. (Martin Robert), - Steffen, Martin Robert,
    Publication info: Chicago, American Journal of Veterinary Medicine, 1914
    Holding Institution: Multiple institutions