00322nam a2200133 a 450000100080000000500110000800800410001910000180006024500350007826000320011330000100014565300240015565300090017911111611996-12-27       1947    bl uuuu      00u1 u    #d1 aBENNETT, H.H.  aElements of soil conservation.  aNew York: McGraw-Hillc1947  a406p.  aCONSERVACAO DO SOLO  aSOLO