Hopkins, Tony. <br/><br/>
Wildlife of Rivers and Canals/ 
Tony Hopkins, Pat Brassley. 
 - London:  Moorland Publishing,  1982. 
 - 200 p.  24 cm. 
<br/><br/><label>ISBN: </label>0861900618 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater biology
<br/><br/><label>LC Class. No.: </label>QH96