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  1. 1

    Toxic heavy metals in Abatan River continue to pose health risk-expert 由 Ligalig, Mike O.

    發表在 Manila Bulletin (2004)
    Article

    Toxic heavy metals in Abatan River continue to pose health risk-expert
  2. 2

    Traces of lead found in Davao water reservoir 由 Panesa, Edmer F.

    發表在 Manila Bulletin (2003)
    Article

    Traces of lead found in Davao water reservoir

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