Clegg, John <br/><br/>
Freshwater life / 
by John Clegg 
 - 3rd ed. 
 - London :  Frederick Warne,  1974 
 - x, 283 p., 64 p. of plates :  ill.  (some col.) ;  23 cm. 
<br/><br/>Includes bibliography: (p. 268-272) and index 
<br/><br/><label>ISBN: </label>0723217629 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater biology--United Kingdom