1991
Netherlands. Ministry of Housing, Spatial Planning and the Environment -NL, VROM,
Individuele behandeling van afvalwater bij verspreide bebouwing (IBA) : onderzoek fase 4B : IBA richtlijn, vol. no. 1991/7. The Hague, The Netherlands: Netherlands, Ministry of Housing, Spatial Planning and the Environment, 1991, p. 186 p. : fig., tab.
K. E. Kefinco - Kakamega, Helsinki, F. I. F. I. N. N. I. D. A. -, y KE, K. Ministry o,
«Kenya-Finland Western Water Supply Programme : annual report 1991». Kefinco, Helsinki, Finland, p. 30 p. + annexes (ca. 35 p.) : tab., photogr., 1991.
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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.
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.
M. Borghei,
«Performance of small sewage works in Tehran», in
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J. E. Gould,
Rainwater catchment systems for household water supply, vol. no. 32. Bangkok, Thailand: Environmental Sanitation Information Center, ENSIC, 1991, p. iii, 57 p.: 12 fig., 14 photogr., 4 tab.
Ubin Abdul Malik y Bin Othman, H.,
«Rainwater cistern system in Malaysia reconsidered», in
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«Rainwater harvesting and water use in the barrios of Tegucigalpa». UNICEF, Tegucigalpa, Honduras, p. XI, 60 p.: 11 fig., 6 tab., ill., photogr., 1991.
O. B. Kaplan,
Septic systems handbook, 2nd ed.ª ed. Chelsea, MI, USA: Lewis, 1991, p. xx, 434 p.: 56 fig., 28 tab.
J. Mde Azevedo Netto, Bakalian, A., Wright, A., y Otis, R.,
«Simplified sewers : a review of Brazilian experience», presented at the 1991-01-01, Alexandria, VA, USA, 1991, p. 11 p.: 3 tab.