000 00243 a2200121 4500
008 151002tMay-Aug. 1985
245 _aMutation Research
250 _aVol. 174
260 _aU.S.A.
260 _bELSEVIER
260 _cMay-Aug. 1985
942 _cBV
999 _c4195
_d4195