1991
B. A. Janonis, Logsdon, G. S., Collins, M. R., Barrett, J. M., Bryck, J. M. G., y Hendricks, D.,
Manual of design for slow sand filtration. Denver, CO, USA: American Water Works Association, 1991, p. xxxv, 247 p.: fig., tab.
L. Ministry o LS,
«Manual of standardisation planning, design and construction of village water supplies». Lesotho, Ministry of Interior, Chieftainship Affairs and Rural Development, Village Water Supply, Maseru, Lesotho, p. 75 p. : fig., maps, tech. drwngs., 1991.
B. H. Regional O. Manama y CEHA -Amman, JO, WHO/EMRO Regional Centre for Environmental Health Activities,
«Manual on water and sanitation for health in refugee camps», vol. no. TLM-1. Centre for Environmental Health Activities (CEHA), Amman, Jordan, p. vii, 76 p.: fig., tab., map, 1991.
J. M. Ossete y Okogna, M. B.,
«Manuel de construction des citernes - paniers de 900 litres». Centre Regional pour l'Eau Potable et l'Assainissement a Faible Cout (CREPA), Brazzaville, Congo, p. 39 p. : ill., tab., 1991.
M. H. A. Wegelin-Schuringa,
«On-site sanitation : building on local practice», vol. no. 16-E. IRC, The Hague, The Netherlands, p. 74 p.: fig., tab., 1991.
E. Gohl, Ullrich, G. J., y Krappitz, U.,
«Participatory approaches for cooperative group events : basic concepts, case study, practical tips». German Foundation for International Development (DSE), Bonn, Germany, p. iv, 77 p. : photogr., 1991.
D. M. Nielsen,
Practical handbook of ground-water monitoring. Chelsea, MI, USA: Lewis, 1991, p. x, 717 p.: fig., tab.
N. C. South Paci Noumea y International Centre for Ocean Development -Halifax, NS, CA,
«The principles of extension and communication skills : a manual for the fisheries extension officers in the Pacific islands», vol. no. 30. South Pacific Commission, Noumea, New Caledonia, p. v, 92 p.: fig., ill., 1991.
S. K. Lwanga y Lemeshow, S.,
Sample size determination in health studies : a practical manual. Geneva, Switzerland: World Health Organization (WHO), 1991, p. viii, 80 p.: 14 tab.
O. B. Kaplan,
Septic systems handbook, 2nd ed.ª ed. Chelsea, MI, USA: Lewis, 1991, p. xx, 434 p.: 56 fig., 28 tab.
S. Minkin,
«Water, gardens, and health : a guide for community educators». UNDP Division for Global and Interregional Programmes, New York, NY, USA, p. V, 61, [39] p.: ill., 1991.
J. Mate,
«Why a pit latrine : a manual for extension workers and latrine builders», vol. no. 8. Piped Supplies for Small Communities (PSSC) Project Zambia, S.l., p. ii, 22 p.: fig., 1991.
1990
I. L. Nyumbu, Scott, M., Seager, M., y Wang, C.,
«Agua potable y saneamiento : manual de principios y metodos financieros». World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. iv, 100 p.: fig., 1990.
I. L. Nyumbu, Scott, M., Seager, M., y Wang, C.,
«Approvisionnement public en eau et assainissement : principes et methodes de gestion financiere manuel». World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. iv, 100 p.: fig., 1990.