000 00252 a2200121 4500
008 151002tFeb.-Dec. 1980
245 _aMutation Research
250 _aVol. 74 No. 1-6
260 _aU.S.A.
260 _bELSEVIER
260 _cFeb.-Dec. 1980
942 _cBV
999 _c4122
_d4122