00755     2200253   4500001002100000005001500021035002000036007000300056008004100059100002800100245008300128300004000211264003900251336002100290337003000311338002300341020001700364082001400381084002000395650002400415650001400439650001500453504003300468PBTAN00000000000146620250213091531  a0010-0225000107ta250213                g          0 eng  0 aTripp RobertePengarang1 aPlanned change in farming systems: progres in on-farm research /cRobert Tripp  ax-348 halaman :bIlustrasi ;c25 cm  aEngland :bJohn Wiley; Sons,c1991  2rdacontentatext  2rdamediaatanpa perantara  2rdacarrieravolume  a0471-93417-8  a631.117.2  a631.117.2 TRI p 4aPerubahan terencana 4apertanian 4apenelitian  aBibliografi; halaman 336-337