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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Briggs, Edward M. - DeHart, R. C. - Southwest Research Institute.
    Edition: Rev. May 1964.
    Publication info: San Antonio, Tex, Southwest Research Institute, 1964
    Holding Institution: MBLWHOI Library
  2. By: Bynum, D. J. - DeHart, R. C. - Southwest Research Institute.
    Publication info: San Antonio, Tex, Southwest Research Institute, 1963
    Holding Institution: MBLWHOI Library