000 00252 a2200121 4500
008 151002tSep.-Dec. 1980
245 _aMutation Research
250 _aVol. 79 No. 1-4
260 _aU.S.A.
260 _bELSEVIER
260 _cSep.-Dec. 1980
942 _cBV
999 _c4127
_d4127