00678pam a2200193 a 450000500170000000800410001701000170005802000220007504000230009708200260012024501200014626000440026630000350031044000270034550400290037265000340040165000270043570000220046220241112080351.0180418s1988    dcua     b   i000 0 eng    a   88000195   a0821310305 (pbk.)  aDLCcDLCdBD-DhBPA00a333.913219bEFF 198800aEfficiency in irrigation :bthe conjunctive use of surface and groundwater resources /cedited by Gerald T. O'Mara.  aWashington, D.C. :bWorld Bank,cc1988.  aviii, 196 p. :bill. ;c28 cm. 2aA World Bank symposium  aIncludes bibliographies. 0aIrrigationxEconomic aspects. 0aIrrigation efficiency.1 aO'Mara, Gerald T.