003690000a22001210004500060000800000082001500008100001600023245003000039260004500069260000900114300000800123650011600131  a100  a303.44 NAI  aNair, P S D  aKarshika Vinjana Vyapanam  aTrivandrum, State institute of languages  c1970  a217  aSocial development Malayalam books / Malayalam books social devlopment / agricultural extension Malayalam books