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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Robertson, Philip B - Shelton, Charles R
    Type: Article
    In: Gulf research reports
    Volume: 6
    Issue: 4
    Date: 1980
    Page Range: 415--420
    Publication Info: Ocean Springs, Miss, Gulf Coast Research Laboratory, 1961-
  2. By: Callahan, Betty J - Clark, Scott T. - Robertson, Philip B
    Type: Article
    In: Gulf research reports
    Volume: 6
    Issue: 1
    Date: 1977
    Page Range: 77--78
    Publication Info: Ocean Springs, Miss, Gulf Coast Research Laboratory, 1961-