000 00313nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a631/635
_bADV.69
245 0 _aAdvances in agronomy V.69
260 _aSan Diego
_bAcademic Press
_c2000
650 _aAgroecosystems
700 _aSparks, Donald L
942 _cBK
999 _c41729
_d41729