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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Johannsen, O. A. (Oskar Augustus), - Butt, Ferdinand H. (Ferdinand Hinchley),
    Edition: 1st ed.
    Publication info: New York, McGraw-Hill Book Company, inc, 1941
    Holding Institution: MBLWHOI Library
  1. By: Butt, Ferdinand H. (Ferdinand Hinchley),
    Type: Article
    In: Smithsonian miscellaneous collections
    Volume: 137
    Date: 1959
    Page Range: 43--60
    Publication Info: Washington Smithsonian Institution 1862-1972