000 003330000a22001450004500
082 _a575.1 SIN
100 _aSingleton, W.Ralph
245 _aElementary genetics
250 _a2
260 _aNew York, Van nastrand rainhold company
260 _c1967
300 _a576
650 _aGenetics/Mutation/ Evolution
942 _cBK
999 _c349827
_d349827