00335    a2200109   4500020001500000082001500015245004600030260008300076300001900159650002400178650002300202  a9068326279  a631.7bTRO  aTropical agriculture bselected handbooks  aAmsterdambTechnical Centre for Agricultural and Rural Cooperationc1988g1988  axi,119p.c24cm  aSpecific techniques  aWater conservation