H. Lockwood, Smits, S., Schouten, T., y Moriarty, P. B.,
«Providing sustainable water services at scale :background paper presented at the International Symposium on Rural Water Services "Providing Sustainable Water Services at Scale", 13-15 April 2010, Kampala, Uganda,», presented at the 2010-04-01, The Hague, The Netherlands, 2010, p. 23 p. : 1 box, 4 fig.