004820000a22001450004500060000800000082001400008100002200022100001400044100001900058245011500077260005900192260000900251300000800260650006800268  a100  a338.1 CHA  aChawdhari, T.P.S.  aRao, T.V.  atripathy, R.N.  aResource use and productivity on farms : a comparative study of intensive and non - intensive agriucltual area  aHyderabad, National Institute of Community development  c1969  a111  aResource use - farms/ productivity farms/ sample farm structure