නිපැයුම් ඉහළට පරිසරය විපතට

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S_2015_OCT_21_RIVIRA.pdf (1.66 MB)

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2015-10-21

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කොළඹ: රිවිර ප්‍රකාශක

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https://dl-cea.nsf.gov.lk/handle/1/16276

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රිවිර

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