000			00279nam a22001217a 4500
082			_a546 _bNEC/C
100			_aNechaev,I.
245			_aChemical elements / _cI.Nechaev.
260			_c1960. _bKitabistan : _aAllahabad,
300			_a219p. : _bpb.
650			_aCHEMISTRY
942			_cBK
999			_c20626 _d20626