00555nam a2200217 a 450000100080000000500110000800800410001910000170006024500790007726000430015630000160019965000090021565000100022465300100023465300260024465300120027065300090028265300100029170000170030170000190031810041672014-09-17 1980 bl uuuu 00u1 u #d1 aTROEH, F. R. aSoil and water conservation for productivity and environmental protection. aEnglewood Cliffs : Prentice-Hallc1980 a718 p.cil. aSoil aWater aÁgua aConservação do solo aErosão aSolo aSolos1 aHOBBS, J. A.1 aDONAHUE, R. L.