00448    a2200145   4500020001500000082001500015100002400030245009400054260004100148300002000189440004800209650001600257650001400273650001500287  a0891586997  a338.1bHAR  aHarwood, Richard R.  aSmall farm development bunderstanding and improving farming systems in the humid tropics  aColoradobWestview pressc1979g1979  axiv,160p.c23cm  aIADS development-oriented literature series  aAgriculture  aEconomics  aProduction