003430000a22001210004500060000800000082002400008100001800032245005900050260002900109260000900138300000800147650006600155  a100  a630. 715 054 83 BAC  aBacon, Earl I  aHand book on extension for extension workers of Kerala  a Trivandrum, Govt: Press  c1959  a117  aFarm workers- Kerala/ Agricultural extension services- Kerala