Global freshwater quality : a first assessment / edited by Michael Meybeck, Deborah V. Chapman, Richard Helmer. — Oxford : Basil Backwell, 1989. — CIDIMA. — 306 p. : gráf. ; 28 cm. — ( Global environment monitoring system) En port.: published on behalf of the World Health Organization and United Nations Enviroment Programme ISBN 0-631-17314-5 1. Calidad del agua.2. Aguas continentales. I. Meybeck, Michel, ed.. II. Chapman, Deborah V., ed.. III. Helmer, Richard, ed.. 504.45.06
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