000 00288nam a2200121Ia 4500
008 140317s9999 xx 000 0 und d
082 _a631.5
100 _aSimmonds,N.W.
245 _aPrinciples of crop improvement.
260 _aLondon
_bLongman
_c1979
300 _a408
942 _2ddc
_cBK
999 _c9324
_d9324