00380    a2200121   4500020001500000082001500015100001800030245007000048260005400118300002000172440005000192650001600242  a0521348870  a630.7bROL  aRoling, Niels  aExtension sciencebinformation system in agricultural development  aCambridgebCambridge University Pressc1988g1988  axii,233p.c23cm  aCambridge studies in agricultural development  aAgriculture