Ricker, W  E <br/><br/>
Methods for assessment of fish production in fresh waters/2nd ed. 

 - 2nd ed. 
 - Edinburgh  Oxford  1971 
 - IBP handbook  3 .
<br/><br/><label>Subjects--Index Terms: </label>Fresh water fisheries 
<br/><br/><label>Dewey Class. No.: </label>639.21  / L1