H. Holtslag, Fajardo, A., y van der Zee, J.,
«Raising rural incomes with low-cost water technologies [paper presented at the SIMI workshop (Global initiative for small-scale irrigation) Switzerland, May 2002]». Engineering for Developing Communities(EDC), Boulder, CO, USA, p. 2 p. : 1 tab., 2002.
K. Bayliss, Hall, D., y Lobina, E.,
«Water privatisation in Africa». Public Services International Research Unit (PSIRU), University of Greenwich, London, UK, p. 40 p. : tab., 2002.