003130000a22001210004500060000800000082001400008100002100022245002100043260004500064260000900109300000800118650006500126  a100  a631.4 THO  aThomas, Varghese  aMrithikavijnanam  aTrivandrum, State institute of languages  c1972  a181  aSoil science- Malayalam books/ Malayalam books- soil science