00507nam a2200181Ia 4500003000400000008004100004020001500045082001800060100001500078245005900093250001500152260004100167300001000208650003400218650004100252650001800293650001400311OSt170901s1999    xx            000 0 und d  a8185421560  a630.717bR22E  aRay, G. L. 0aExtension Communication and Management /cby G. L. Ray  a.- 4th ed.  a.- Calcuttab: Naya Prokashc, 1999.  a160p.  aTechnology (Applied sciences)  aAgriculture and related technologies  aCommunication  aExtension