L. Koestler, Koestler, M. A., and Gisler, C.,
“New incentives : economic projections with the water - person - years concept : paper presented at the IRC symposium ‘ Pumps, Pipes and Promises: Costs, Finances and Accountability for Sustainable WASH Services' in The Hague, The Netherlands from 16 - 18 ”, presented at the 2010-11-16, The Hague, The Netherlands, 2010, p. 11 p.; 6 ref.; 1 tab.; 3 fig.