Biblio

I. Hespanhol and 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.

M. Meybeck, Kimstach, V., and Baroudy, E., A water quality assessment of the former Soviet Union. London, UK: E & FN Spon, 1998, p. xvii, 611 p. : fig., tab.

I. Hespanhol and 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.