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Please read BHL's Acknowledgment of Harmful Content
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  1. By: United States. Naval Oceanographic Office.
    Publication info: Washington, 1970-
    Holding Institution: MBLWHOI Library
    Subjects: Echo scattering layers  
  2. By: Pickwell, George V. - United States. Navy. Electronics Laboratory.
    Publication info: San Diego, Calif, U.S. Navy Electronics Laboratory, 1966
    Holding Institution: MBLWHOI Library
    Subjects: Echo scattering layers  physiology  Siphonophora  Sonar