000 00323nam a2200133Ia 4500
008 240913s9999||||xx |||||||||||||| ||und||
082 _a500 DAV/T
100 _aMonika davar
245 0 _aTeaching of science
250 _aNULL
260 _bPHI Learning private Limited
_aNew Delhi
_c2012
300 _a254
942 _cBKS
999 _c16549
_d16549