000 00304nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a631(02) N9.66
100 _a"Sparks, D.L."
245 _aAdvances in Agronomy -vol.66
260 _a1999
_bAcademic Press
_cCalifornia
300 _a304
942 _cBK
999 _c61284
_d61284