00437naa a2200157 a 450000100080000000500110000800800410001910000170006024500630007726000090014065000220014965000180017165300150018965300120020477300630021618325632010-01-10       1976    bl ---       0--  u    #d1 aYOUNG, P. E.  aA machine to increase productivity of a tillage operation.  c1976  aMaquina Agrícola  aProdutividade  aOperação  aPreparo  tTransactions of the ASAEgv. 19, n. 6, p. 1055-1061, 1976.