Methods for assessment of fish production in fresh waters / 
edited by W. E. Ricker. 
 - London :  International Biological Programme,  1968. 
 - xiii, 320 p. :  ill. ;  21 cm. 
 - IBP handbook ;  no. 3 .
<br/><br/>Includes bibliographical references : p. 270-306. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fish populations.