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  1. By: Shevock, James R - Ertter, Barbara - Jokerst, James D
    Type: Article
    In: Madroño; a West American journal of botany.
    Volume: 36
    Date: 1989
    Page Range: 271--279
    Publication info: Berkeley,California Botanical Society.
  2. By: Jokerst, James D
    Type: Article
    In: Madroño; a West American journal of botany.
    Volume: 38
    Date: 1991
    Page Range: 278--286
    Publication info: Berkeley,California Botanical Society.