000 00306nam a22001217a 4500
003 OSt
008 110804t xxu||||| |||| 00| 0 eng d
082 _221st
_a370.102.024 5 TEA
245 _aTeaching of Science
260 _aNew Delhi
_bIGNOU
_c2000 PB
650 _aTeaching of Science
_9654
942 _2ddc
_cIGNOU
999 _c980
_d980