Clean water works : water resources activity guide for grades 7, 8, 9 /

Detalles Bibliográficos
Autor Corporativo:	Delaware Estuary Program
Formato:	Libro
Idioma:	English
Publicado:	[Wilmington, DE?] : The Program, [1997?]
Subjects:	Water-supply > Study and teaching (Elementary) > Problems, exercises, etc. Water quality management > Study and teaching (Elementary) > Problems, exercises, etc. Water > Pollution > Study and teaching (Elementary) > Problems, exercises, etc. Water > Pollution > Study and teaching (Elementary) Water > Pollution. Water quality management. Water-supply > Study and teaching (Elementary) Water-supply. Problems and exercises.

Descripción
descrición da copia:	Title from cover.
Descrición Física:	48 pages : illustrations ; 28 cm
Bibliografía:	Includes bibliographical references.

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