Mannual of methods in fisheries biology 
compiled by T. Laevastu  
 - Rome   FAO  1965 
 - 4 sects;24cm.- 
 - FAO manuals in fisheries science; no.1 .
<br/><br/> sec. 4. Research on fosh stocks  
<br/><br/><label>Dewey Class. No.: </label>639.2  / LAE