Tesar, Jenny Elizabeth. <br/><br/>
Threatened oceans / 
Jenny Tesar. 
 - New York :  Facts On File,  c1991. 
 - 112 p. : ill. 
 - Our fragile planet ; 5 .
<br/><br/> Includes glossary, bibliography, and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography--Juvenile literature.