000 00245 a2200121 4500
008 151002tApr.-Jun. 1983
245 _aMutation Research
250 _aVol. 117
260 _aU.S.A.
260 _bELSEVIER
260 _cApr.-Jun. 1983
942 _cBV
999 _c4140
_d4140