J. Davis and Iyer, P.,
“Taking sustainable rural water supply sevices to scale : where are the bottlenecks?”,
Waterlines, an international journal of water, sanitation and waste, pp. p. 8-10 : 2 photogr., 2004.
J. Davis,
“Who lacks water and sanitation service? : a typology of unserved communities”. United Nations Millennium Development Task Force on Water and Sanitation, New York, NY, USA, p. 33 p. : 3 fig., 3 tabs., 2004.