000 00284nam a2200121Ia 4500
008 151205s9999||||xx |||||||||||||| ||und||
020 _c0
100 _aSINGLETON,W.RALPH
245 _aELEMENTARY GENETICS
260 _c1969
_bvan nostrand
650 _aANIMAL GENETICS
942 _cBK
999 _c294694
_d294694