00477nam a2200181Ia 4500008004100000041001200041082001100053082001100064100002000075100001100095245006300106250001200169260001400181260004700195260000900242650002400251650002000275150909s9999    xx            000 0 und d  aEnglish  a333.91  bLYA/RI  aLyapichev P A    eAuthor  aRivder runoff regulation and water management calculations  a2nd Ed.  aJerusalem  bIsreal Program for scientific translations  c1975  aResources economics  aWater treatment