000 00252 a2200121 4500
008 151002tAug.-Oct. 1980
245 _aMutation Research
250 _aVol. 72 No. 1-3
260 _aU.S.A.
260 _bELSEVIER
260 _cAug.-Oct. 1980
942 _cBV
999 _c4120
_d4120