«Soundings from around the world». World Neighbors, Oklahoma City, OK, USA.
UNDP -New York, NY, US,
«Source». UNDP Division of Information, New York, NY, USA.
USAID -Washington, DC, US y Horsley and Witten -Sandwich, MA, US,
«Source water protection: a training manual for communities in Nicaragua». US Environmental Protection Agency (EPA), Washington, DC, USA, p. 57 p. : fig., fotographs.
T. F. Bastemeijer,
«Southern Darfur province of Sudan». IRC, The Hague, The Netherlands, p. Slide series (64 slides + text, 3p.).
«Special report / SWECO-VBB». SWECO-VBB, Stockholm, Sweden.
Special report / Water Resources Research Center. Honolulu, HI, USA: University of Hawaii at Manoa, Water Resources Research Center.
CTA -Wageningen, NL, Technical Centre for Agricultural and Rural Cooperation ACP-EU,
«Spore». Technical Centre for Agriculture and Rural Cooperation (CTA), Wageningen, The Netherlands.
J. C. Royer,
«Standard detail drawings - waterworks : a job - aid». Pan American Health Organization (PAHO), Bridgetown, Barbados, p. 29 p.: techn.drwngs.