00405    a2200145   4500020001500000082001500015100002200030245008000052250001200132260004900144300002100193650001500214650001600229650001400245  a0333467175  a338.1bJOH  aJohnson, David T.  aThe business of farmingba guide to farm business management in the tropics  a2nd ed.  aLondonbMacmillan publishers Ltdc1990g1990  a[iv],377p.c25cm  aProduction  aAgriculture  aEconomics