000 00302nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a631(02) N4.52
100 _a"Sparks, D.L."
245 _aAdvances in Agronomy -vol.52
260 _a1994
_bAcademic Press
_cNew York
300 _a281
942 _cBK
999 _c61190
_d61190