Efficiency in irrigation : the conjunctive use of surface and groundwater resources / edited by Gerald T. O'Mara. - Washington, D.C. : World Bank, c1988. - viii, 196 p. : ill. ; 28 cm. - A World Bank symposium . Includes bibliographies. ISBN: 0821310305 (pbk.) LCCN: 88000195 Subjects--Topical Terms: Irrigation--Economic aspects.Irrigation efficiency. Dewey Class. No.: 333.913 / OME 1988