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Filters: Keyword is yemen sana'a  [Clear All Filters]
I. Hespanhol y Helmer, R., «Control de la contaminacion del agua : guia para la aplicacion de principios relacionados con la calidad del agua». CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), Lima, Peru, p. xvi, 546 p. : fig., tab., 1999.
I. Hespanhol y Helmer, R., Water pollution control : a guide to the use of water quality management principles. London, UK: E & FN Spon, 1997, p. xvi, 510 p. : boxes, fig., maps, tab.
C. H. W. S. S. C. C. Work Geneva, «CCWS&S working group on water pollution control : papers». Water Supply and Sanitation Collaborative Council, WSSCC, Geneva, Switzerland, p. 17 papers (ca. 450 p.): fig., tab., 1995.
«The drinking water supply and waste water disposal in Sana'a, YAR : a problem still to be solved», in International symposium, 24-29 April 1988 : hydrological processes and water management in urban areas : proceedings of the conference, 1988, pp. P. 811-813: fig.
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