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  1. By: Webber, John Milton
    Type: Article
    In: Madroño; a West American journal of botany.
    Volume: 15
    Date: 1960
    Page Range: 187--192
    Publication info: Berkeley,California Botanical Society.
  2. By: Webber, John Milton
    Type: Article
    In: Madroño; a West American journal of botany.
    Volume: 8
    Date: 1945
    Page Range: 105--110
    Publication info: Berkeley,California Botanical Society.