000 00321nam a2200121Ia 4500
008 140208s9999 xx 000 0 und d
020 _a0011183X
044 _aU.S.A.
245 _aCrop Science. v.21,1981
_c
260 _bCrop Science Society of America
_aMadison
_c1981
300 _av.21, 1006 p.; 24cm.
942 _2udc
_cP
999 _c14650
_d14650