TY - JOUR A1 - van der Zaag, P. A1 - Gupta, J. A1 - Darvis, L. P. T1 - HESS Opinions "Urgent water challenges are not sufficiently researched" JO - Hydrol. Earth Syst. Sci. J1 - HESS VL - 13 IS - 6 SP - 905 EP - 912 Y1 - 2009/06/23 PB - Copernicus Publications SN - 1607-7938 UR - http://www.hydrol-earth-syst-sci.net/13/905/2009/ L1 - http://www.hydrol-earth-syst-sci.net/13/905/2009/hess-13-905-2009.pdf DO - 10.5194/hess-13-905-2009 ER -