00430naa a2200145 a 450000100080000000500110000800800410001910000190006024500750007926000090015465000210016365000120018465000090019677300790020510752042012-08-29       1992    bl ---       0--  u    #d1 aSANDERS, D. W.  aInternational activities in assessing and monitoring soil degradation.  c1992  aDesertificação  aErosão  aSolo  tAmerican Journal of Alternative Agriculturegv. 7, n. 1/2, p. 17-24, 1992.