Downinf, John A <br/><br/>
A manual on methods for the assessment of secondary production in fresh waters 

 - Oxford  Oxford black well scientific   1984 
 - 501 p. 
<br/><br/> 20213 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology 
<br/><br/><label>Dewey Class. No.: </label>574.5263  / D