00374nam a2200121Ia 450000500170000000800410001702000160005805000240007410000200009824500600011826000400017865000340021820251229125149.0251229s9999    xx            000 0 und d  a08213210-64  aAFR HD 1741. S15B76  aBrown, Ellen P. 0aSUCCESSFUL SCALE IRRIGATION IN THE SAHELcEllen P Brown  aWashingtonb D. C.c The World Bank  aIrrigation - Economic Aspects