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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ooststroom, S. J. van
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 29
    Issue: 4
    Date: 1948
    Page Range: 414--418
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-
  2. By: Ooststroom, S. J. van
    Type: Article
    In: Tijdschrift voor entomologie
    Volume: 88
    Date: 1947
    Page Range: 543--546
    Publication Info: [Amsterdam], Nederlandse Entomologische Vereniging,