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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Zhang, Yin-Sun - Ding, W-N - Bu, He - Tian, Lu
    Type: Article
    In: Forktail
    Volume: 7
    Date: 1992
    Page Range: 131--137
    Publication Info: Oxford,
  2. By: Zhang, Yin-Sun - He, Fengqi
    Type: Article
    In: Forktail
    Volume: 8
    Date: 1993
    Page Range: 125--132
    Publication Info: Oxford,