000 00261nam a22001097a 4500
100 _aEkanayake,E.M.M
245 _aWater Pollution in Kelani and Mahaweli Rivers
260 _aColombo
_bIchemc
_c2012
300 _a29
650 _aWater Pollution
_a2012
942 _cBK
999 _c3236
_d3236