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  1. A late Tertiary diatom flora from Oregon
    By: Orr, W N - Ehlen, Judi - Zaiteff, J B
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series.
    Volume: 37
    Series: 4
    Date: 1971
    Page Range: 489--500
    Publication info: San Francisco,California Academy of Sciences.
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