Balcázar, A.R. y Perea, C., «From dirty to clean pipes : a review of an anti-corruption agreement to prevent corruption in water and wastewater pipe supply in Colombia : paper presented at the IRC symposium ‘ Pumps, Pipes and Promises: Costs, Finances and Accountability for Sustainab», presented at the 2010-11-16, The Hague, The Netherlands, 2010, p. 9 p.; 1 ref.; 3 boxes; 1 tab.; 8 photographs.