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  1. By: Smith, Robert L.
    Type: Article
    In: Lasca leaves
    Volume: 19
    Date: 1969
    Page Range: 55-59
    Publication Info: Arcadia, Calif, California Arboretum Foundation, 1950-1976
    Subjects: Camptotheca acuminata  Camptothecin  Cancer -- Research
  2. By: Perdue, Robert E
    Type: Article
    In: Lasca leaves
    Volume: 18
    Date: 1968
    Page Range: 55-59
    Publication Info: Arcadia, Calif, California Arboretum Foundation, 1950-1976
    Subjects: Camptotheca acuminata  Camptothecin  Cancer -- Research
  3. Type: Article
    In: Lasca leaves
    Volume: 20
    Date: 1970
    Page Range: 31
    Publication Info: Arcadia, Calif, California Arboretum Foundation, 1950-1976
    Subjects: Camptotheca acuminata  Camptothecin  Cancer -- Research