00505nam a2200145Ia 4500008004100000010001200041040001700053082002300070100001900093245008200112260004600194300001600240440003900256650006400295190327s9999||||xx |||||||||||||| ||und||  a58-7501  aNITILcNITIL  221sta333.91bE19W  aEckstein, Otto 0aWater resource developmentbthe economic of project evaluationcOtto Eckstein  aCambridgebHarvard University Pressc1958  axiii, 300p.  aHarvard economic studies; vol. civ  aWater resource development; Natural resources; Water-Supply