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  1. Type: Article
    In: Lasca News
    Volume: 1971
    Date: 1971
    Page Range: 1-2
    Publication Info: Arcadia, Calif, Los Angeles State and County Arboretum,
    Subjects: Hiatt, Glenn H.  Spaulding, George H.  Walker, Harry  
  2. Type: Article
    In: Delascan
    Volume: 1966
    Date: 1966
    Page Range: 2
    Publication Info: [Arcadia, Calif, California Arboretum Foundation, Inc.], 1960-1969
    Subjects: Walker, Harry  
  3. Type: Article
    In: Lasca leaves
    Volume: 22
    Date: 1972
    Page Range: 6
    Publication Info: Arcadia, Calif, California Arboretum Foundation, 1950-1976
    Subjects: Aphids -- California  Walker, Harry