Duffey,Eric <br/><br/>
Biological conservation 

 - England  Applied science publisher ltd  
 - 8p,iill.,  12*22 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology <br/>Freshwater
<br/><br/><label>Universal Decimal Class. No.: </label>595.384  / DUF