Frost, Helen, 1949-

Keeping water clean / by Helen Frost. - Mankato, Minn. : Pebble Books, c2000. - 24 p. : ill. ; 19 cm. - Water . - Frost, Helen, 1949- Water. .

Includes bibliographical references (p. 23) and index.

Simple text and photographs describe water pollution, how it spreads, and its effects.

ISBN: 0736804080

LCCN: 99019590

Subjects--Topical Terms:
Water--Pollution.
Pollution.

LC Class. No.: TD422 / .F76 2000

Dewey Class. No.: 363.739/4