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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Halvorsen, Frank
    Type: Article
    In: Delascan
    Volume: 1963
    Date: 1963
    Page Range: 1
    Publication Info: [Arcadia, Calif, California Arboretum Foundation, Inc.], 1960-1969
  2. By: Halvorsen, Frank
    Type: Article
    In: Lasca leaves
    Volume: 12
    Date: 1962
    Page Range: 72
    Publication Info: Arcadia, Calif, California Arboretum Foundation, 1950-1976