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040			_aMAIN
041			_aEnglish
082			_a541.388 _bHAR
100			_aHarper, Dorothy
245			_aIsotopes in action
260			_aLondon _bPergamon press _c1963
300			_a172p.
650			_aChemistry
650			_aIsotopes
650			_aPhysical chemistry
942			_cBK
999			_c32291 _d32291