ලෝක පරිසර දිනය 2012

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Date

2012

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බත්තරමුල්ල:මධ්‍යම පරිසර අධිකාරිය, 56පි.

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World Environment Day

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https://dl-cea.nsf.gov.lk/handle/1/223

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Books (Sinhala)

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