00488nam a2200193 a 450000100080000000500110000800800410001910000190006024500680007926000300014730000090017765000130018665000120019965000180021165300120022965300130024170000190025470000210027317512271994-04-28       1992    bl uuuu      00u1 u    #d1 aSCHULTZ, J. J.  aPhosphate, fertilizers and the environmentba discussion paper.  aMuscle Shoals: IFDCc1992  a51p.  aEcologia  aFosfato  aMeio Ambiente  aEfeitos  aImpactos1 aGREGORY, D. I.1 aENGELSTAD, O. P.