00493nam a2200181 a 450000100080000000500110000800800410001910000170006024500510007726000240012830000150015249000470016765300150021465300240022965300210025365300250027465300120029911060141980-12-10               bl uuuu      00u1 u    #d1 aHOPFEN, H.J.  aFarm implements for arid and tropical regions.  aRome: FAO, 1969.c0  a159p.cil.  a(FAO. Agricultural Development Paper, 91).  aFERRAMENTA  aIMPLEMENTO AGRICOLA  aMAQUINA AGRICOLA  aMECANIZACAO AGRICOLA  aTROPICO