Mills, D.H. <br/><br/>
An introduction to freshwater ecology 
D.H. Mills 
 - Edinburgh  Oliver & Boyd  c1972 
 - vii, 101.:  ill., fig., tables ;  22cm 
<br/><br/> Bibliographical references and index at the end 
<br/><br/><label>ISBN: </label>0050023977 9780050023976 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>577.6/M657i