K. Leng Sow,
«Application of inclined tube settlers in urban water supply». Asian Institute of Technology, Bangkok, Thailand, p. vii, 101 p.: fig., tab., 1983.
R. J. Lichtman,
Biogas systems in India. Arlington, VA, USA: Water and Sanitation for Health Project (WASH), 1983, p. vi, 130 p.
H. M. Levin,
Cost-effectiveness : a primer, vol. vol. 4. London, UK: SAGE Publications, 1983, p. 167 p. : tab.
F. R. G. E. R. E. S. - Marseille y Paris, F. R. G. R. E. T. -,
Les dossiers du biogaz. Paris, France: France, Ministere des Relations Exterieures, Cooperation et Developpement, 1983, p. 4 vol. (72, 109, 85, 141 p.): fig., tab.
EPA -Cincinnati, OH, US y EPA -Washington, DC, US,
Process design manual for land application of municipal sludge. Cincinnati, OH, USA: US Environmental Protection Agency (EPA), 1983, p. xxvi, 410 p.: fig., tab.
R. Isely, Cloutier, J., Sines, R., Bisson, D., y Jenkins, D.,
«Togo rural water : mid-term evaluation report». USAID, Regional Economic Development Services Office (West and Central Africa), Abidjan, Ivory Coast, p. 88 p.: fig., 1983.