000 00272nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _aJOHN HOLDEN
245 0 _a"GENES, CROPS AND THE ENVIRONMENT"
260 _bNil
260 _c1993
365 _b395.00
942 _cBK
999 _c160794
_d160794