A Manual on methods for the assessment of secondary productivity in fresh waters 
edited by John A. Downing and Frank H. Rigler 
 - 2nd ed 
 - Oxford  Blackwell Scientific  1984 
 - xxiv, 501p.  ill.  24cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater productivity--Measurement
<br/><br/><label>Dewey Class. No.: </label>574.5  / 2632