00486nam a2200133Ia 4500008004100000082001800041100001500059245011700074260004600191300000800237650004100245650003400286653003200320170901s1992    xx            000 0 und d  a630.717bM29G  aMani, P.S. 0aGuide for professional agricultural extension work under training and visit system for village extension workers  aNew DelhibDirectorate of Extensionc1992  a154  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgricultural extension work