The physiography of the river Nile and is basin . 0 - 25 11 i 25 - 50 50 - too 100 - 20O ?00 - 300 hoV9 SOO ? Survey L>ept. Cairo MEAN MONTHLY RAINFALL. c I I

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectwatersupply, bookyear