Water quality assessments : a quide to the use of biota, sediments and water in environmental monitoring / edited by Deborah Chapman. — London : Unesco [etc.], 1992. — CIDIMA. — 585 p. : gráf., tab. ; 24 cm. — ISBN 0-412-44840-8 1. Calidad del agua.2. Aguas continentales.3. Aguas subterráneas. I. Chapman, Deborah, ed.. 504.4.064