000 00321nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c100
040 _aBED
100 _aMangali , S.K.
245 0 _aGeneral Science Teaching
260 _bARYA BOOK DEPOT
_aNew Delhi
300 _a256
500 _a4008
942 _cBK
999 _c4008
_d4008