000 00243 a2200121 4500
008 151002tSep-Dec. 1986
245 _aMutation Research
250 _aVol. 175
260 _aU.S.A.
260 _bELSEVIER
260 _cSep-Dec. 1986
942 _cBV
999 _c4196
_d4196