000 00296 a2200121 4500
020 _a9788193043776
082 _a540 AJA
100 _aAjai kumar
245 _aChemistry of the main goup elements
260 _bAarysh Education
_c2021
_aMuzaffarnagar
300 _a7.84 +4 v.p.
942 _cBK
_2ddc
999 _c33550
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