J. Kluck,
«Above ground stormwater drainage in an urban area». Delft University of Technology, Dept. of Sanitary Engineering and Water Control, Delft, The Netherlands, p. 33 p. + 82 p. annexes: fig., tab., 1991.
M. B. Degen, Reneau, R. B., Hagedorn, C., y Martens, D. C.,
«Denitrification in onsite wastewater treatment and disposal systems», vol. no. 171. Virginia Water Resources Research Center, Blacksburg, VA, USA, p. xii, 113 p. : fig., tab., 1991.
V. P. Mnyanga,
«Ground water contamination by pit latrines : Dar-es-salaam (Manzese squatter area) case study», vol. no. 39. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. 115 p.: fig., tab., 1991.
M. Detay, Poyet, P., y Brisson, E.,
«Hydrolab : le systeme expert d'aide a l'implantation de forages : concepts, techniques et application au Burkina Faso». Comite Interafricain d'Etudes Hydrauliques (CIEH), Ouagadougou, Burkina Faso, p. 120 p. : 34 fig., 5 tab., 1991.
C. C. Mbigha y Nalluri, C.,
«Mathematical simulation of reciprocating handpump performance»,
Aqua : journal of water supply research and technology, pp. p. 281-290: 10 fig., 1 tab., 1991.
A. P. Cotton y Franceys, R. W. A.,
«Optimizing infrastructure», in
Infrastructure for low-income communities : proceedings of the 16th WEDC conference : Regional Centre for Urban and Environmental Studies (RCUES), Osmania University, Hyderabad, India, 27-31 August, 1990, 1991, pp. p. 47-50: 3 fig.
L. Lovei y Whittington, D.,
«Rent seeking in water supply : discussion paper». World Bank, Water and Sanitation Division, Washington, DC, USA, p. 25 p.: 4 fig., 2 tab., 1991.
R. Ramasubban, Singh, B., Bhatia, R., Griffin, C. C., Kim, C., y Briscoe, J.,
«Rural water supply in Kerala, India : how to emerge from a low-level equilibrium trap». Urban Institute, Washington, DC, USA, p. 47 p.: 3 fig., 11 tab., 1991.
B. Hydbom,
«Step draw-down pumping test», vol. no. 4. UNICEF, Copenhagen, Denmark, p. 14 p.: fig., 1991.