B. F. C. I. L. S. S. - Ouagadougou, Ouagadougou, B. F. Club du Sa, et Lome, T. G. West Afric,
« Hydraulique villageoise et developpement rural dans le Sahel : rapport de synthese », vol. D (80) 111. West African Development Bank, Lome, Togo, p. 26 p., 1981.
O. K. Buros, Cox, R. B., Nusbaum, I., El-Nashar, A. M., et Bakish, R.,
The U.S.A.I.D. desalination manual : a planning tool for those considering the use of desalination to assist in the development of water resources. Teaneck, NJ, USA: International Desalination and Environmental Association, 1981, p. 469 p. in various pagings.
J. F. Mazariegos et De Zeissig, J. A. A.,
« Water purification using small artisan filters ». Central American Research Institute for Industry (ICAITI), Guatemala, Guatemala, p. 81 p.: fig., tab., 1981.
R. M. C. Msengi,
Windmills within water supply, vol. no. N:o 9. Tampere, Finland: Tampere University of Technology, Dept. of Civil Engineering, 1981, p. 83 p. : 27 fig., 6 tab., loose map.