000 00273nam a22001217a 4500
020 _a9789555739733
082 _a500
_bSUM
100 _aSumana pathirathna
245 _aScience GR - 11
260 _aNugegoda
_bSarasavi publishers
_c2009
300 _a365 Pages
942 _cL
999 _c15767
_d15767