Dobson, Mike. <br/><br/>
Ecology of aquatic systems /  
Mike Dobson and Chris Frid. 
 - /   . 
 - London :   Longman ,   1998. 
 - viii,222p. :   figures ;   23cm .  
<br/><br/>includes bibliographical references, glossary and index 
<br/><br/><label>ISBN: </label>0582298040  GBP30.99 
<br/><br/><label>Subjects--Index Terms: </label>AQUATIC ECOLOGY 
<br/><br/><label>Dewey Class. No.: </label>577.6  / DOB/E