Protecting our rivers and lakes. -- 

 - 31 pages :   col. ill. ;   27 cm. 
 -  Junior library of ecology. .
<br/><br/> Translation of: La Defensa de los rios y los lagos. Includes index. 
<br/><br/>   This book explains in clear and simple terms the dangers affecting the water cycle. 
<br/><br/> Grade School 
<br/><br/><label>ISBN: </label>817862575x 
<br/><br/><label>Subjects--Topical Terms: </label>--Water -- Pollution -- Juvenile literature.     --Water quality management -- Juvenile literature.     --Water -- Pollution.    --Pollution.     --Water supply.     --Water quality management.     --Environmental protection.
<br/><br/><label>Dewey Class. No.: </label>372.35/P946