00495nam a2200157Ia 4500008004100000020001500041082001800056100002300074245004700097250000600144260007200150300000800222650004100230650003400271653003200305170901s1984    xx            000 0 und d  a925101504s  a630.715bS96A  aSwanson, Burton E. 0aAgricultural ExtensionbA reference Manual  a2  aRomebFood and Agriculture Organization of the United Nationsc1984  a262  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgricultural extension work