000			00291nam a2200121Ia 4500
020			_a9789556800456
082			_a500 _bDEV
100			_aD.M.A.Devasinghe
245			_aScience Gr 11 _cD.M.A.Devasinghe
260			_aSri Lanka _bSamudra Book Publications _c2011
300			_a70
942			_cBK
999			_c11752 _d11752