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040 _aBangabasi College Library
041 _aEnglish
082 _aCH 541.2
_bAFn48
100 _aASTON, F.W.
245 _aMass spectra and isotopes
_cF.W. Aston
250 _a2nd ed.
260 _bEdward Arnold
_aLondon
_c1942
300 _axii,276p.
_bill.
650 _aISOTOPES
942 _cBK
999 _c203930
_d203930