00520naa a2200181 a 450000100080000000500110000800800410001910000180006024500740007826000090015265300280016165300170018965300200020665300180022670000190024470000170026377300580028010297042004-03-15       2003    bl uuuu     u00u1 u    #d1 aPEREIRA, J.C.  aRoland ristowbuma contribuicao ao estudo da agricultura sustentavel.  c2003  aAgricultura sustentavel  aAgroecologia  aAgroecossistema  aRoland Ristow1 aVINCENZI, M.L.1 aLOVATO, P.E.  tEisforia, Florianopolisgv.1, n.1, p.63-97, jun. 2003