Biblio

S. W. van der Merwe, “New WHO recommendations for water quality standards : impact on water treatment practices : international practices”, Water supply : the review journal of the International Water Supply Association, pp. p. 35-40 : 1 tab., 1996.

B. E. E. U. R. E. A. U. - Brussels, “Implications to water suppliers and householders of the new WHO guidelines for drinking water quality : short report”, Aqua : journal of water supply research and technology, pp. p. 315-322: 7 tab., 1994.