00622nam a2200193 a 450000100080000000500110000800800410001902000170006010000180007724500710009526000310016630000110019752001150020865000130032365300250033665300250036165300240038670000180041012782082009-04-13       1992    bl uuuu      00u1 u    #d  a0-521-3877601 aLOOMIS, R. S.  aCrop ecologybproductivity and management in agricultural systems.  aMelborune: Cambridgec1992  a538 p.  aFarming systems and their biological components; Community concepts; Stability; Genetic resouces; Development.  aEcologia  aAgricultural ecology  aAgricultural systems  aSistemas agrícolas1 aCONNOR, D. J.