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.