00430nam a2200157Ia 4500008004100000082001700041100001500058245004200073250000600115260005800121300000800179650001400187650002000201653003200221700001900253170901s1971    xx            000 0 und d  a333.91bJ22E  aDouglas, L 0aEconomics of Water Resources Planning  a3  aBombaybTata McGraw Hill Publishing Company Ltdc1971  a615  aEconomics  aSocial sciences  aWater resources development  aLee, Robert R.