Dobson, M, Frid, C <br/><br/>
Ecology of aquatic systems 
Mike Dobson, Chris, Frid 
 - Essey  Longman Ltd.  1998 
 - viii, 222p,;  ill, Pbk,; 
<br/><br/><label>ISBN: </label>0582298040 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fishery resources<br/>Aquatic resources