000 00356nam a2200157Ia 4500
020 _a9971892162
040 _cPK-LaCSN
082 _bBAR
_a570
100 _a"Barker, Martin"
245 0 _aO-level biology
260 _bLongman
_aSingapore
_c1990
300 _a316
942 _2ddc
_cBK
999 _c243674
_d243674