Report
                        
                        Hoogesteger, Jaime, Mark  Giordano, Jan  Girman, Jack  van der Gun, Eloise  Kendy, Jacob  Kijne, Ramon  Llamas, Fadia  Daibes, Emilio  Custodio, Maria  Angelica, Tushaar  Shah, and Jacob  Burke.  
Groundwater: a global assessment of scale  and significance. Battaramulla, Sri Lanka: Internation Water Management Institute , 2007.