Source http://www.waterhistory.org/histories/nile/t1.html http://www.waterhistory.org/histories/nile/t1.html#photo1 celebrated http://www.waterhistory.org/histories/nile/t1.html Egypt’s Nile Valley Basin Irrigation. Source Egypt's Nile Valley Basin Irrigation - WaterHistory.org Egypt’s Nile Valley Basin Irrigation.  Sandra Postel: Egypt's Nile Valley Basin Irrigation Egypt’s Nile Valley Basin Irrigation. Source celebrated http://www.waterhistory.org/histories/nile/t1.html Basin Irrigation In Egypt Source Source irrigation Sandra Postel: Egypt's Nile Valley Basin Irrigation http://www.waterhistory.org/histories/nile/t1.html#photo1 Egypt’s Nile Valley Basin Irrigation.