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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Green, Edward Ernest, - Laing, F
    Type: Article
    In: Bulletin of entomological research
    Volume: 12
    Date: 1921
    Page Range: 125--128
    Publication Info: Farnham Royal, Commonwealth Agricultural Bureaux,
  2. By: Laing, F
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 9
    Series: 9
    Date: 1922
    Page Range: 553--557
    Publication Info: London Taylor and Francis, Ltd