000 00319nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a631/635
_bADV.60
245 0 _aAdvances in agronomy V.60
260 _aSan Diego
_bAcademic Press
_c1997
650 _aAgroecosystem
650 _aSustainable agriculture
942 _cBK
999 _c41369
_d41369