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  1. By: Hsuan, Keng
    Type: Article
    In: The Gardens' bulletin, Singapore
    Volume: 26
    Series: 4
    Issue: 2
    Date: 1973
    Page Range: 233--237
    Publication Info: Singapore, Govt. Print. Off. [etc.],
  2. By: Hsuan, Keng
    Type: Article
    In: The Gardens' bulletin, Singapore
    Volume: 26
    Series: 4
    Date: 1972
    Page Range: 127--135
    Publication Info: Singapore, Govt. Print. Off. [etc.],
  3. By: Hsuan, Keng - Heaslett, E A
    Type: Article
    In: The Gardens' bulletin, Singapore
    Volume: 26
    Series: 4
    Issue: 2
    Date: 1973
    Page Range: 223--225
    Publication Info: Singapore, Govt. Print. Off. [etc.],