1992
L. Macharia,
Sanitation options for Kibera low-income area in Nairobi, vol. no. 53. Tampere, Finland: Tampere University of Technology, Institute of Water and Environmental Engineeri, 1992, p. 97 p.: 25 fig., 5 tab.
W. Hogrewe and Singleton, F.,
“Technical review of the Grenada Grand Anse sewer project”, vol. no. 363. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xi, 26 p.: tab., map, 1992.
1991
P. S. R.,
“Conflictos relacionados con el recurso hidrico en el Valle del Cauca, Colombia”. Fundacion para la Investigacion y Proteccion del Medio Ambiente, Cali, Colombia, p. 12 p.: tab., 1991.
M. B. Degen, Reneau, R. B., Hagedorn, C., and 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.
G. McGranahan,
Environmental problems and the urban household in Third World countries. Stockholm, Sweden: Stockholm Environment Institute (SEI), 1991, p. 38 p.: 16 tab.
J. Barwise,
“Local authority environmental policy : a framework for action : conference proceedings report, Robens Institute, University of Surrey”. University of Surrey, Robens Institute, Guildford, UK, p. iv, 144 p.: fig., tab., 1991.
P. E. C. E. P. I. S. - Lima, Lima, P. E. U. N. I. C. E. F. -, and PE, P. Ministerio,
“Saneamiento y salud”. CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), Lima, Peru, p. 8 p.: ill., 1991.
E. O. Mairura and Nyangeri, G. E.,
“Site conditions in infrastructure development”, 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. 59-62: 3 fig.
R. H. Swenson and Rahe, T. M.,
“Water and sanitation efforts among displaced Kurdish citizens”, vol. no. 339. Environmental Health Project (EHP), Arlington, VA, USA, p. ix, 79 p.: photogr., 1991.
D. Hall and Adams, M.,
“Water, sanitation, hygiene and health in the Qabane Valley, Lesotho”. Tebellong Hospital, Primary Health Care Department, Qacha's Nek, Lesotho, p. x, 102 p.: 9 fig., 30 tab., 34 photogr., 1991.