Echo sounding and sonar for fishing. 

 - London :  FAO,  c1980. 
 - xii, 104 pages :  illustrations ;  23 cm. 
<br/><br/> FAO Fishing Manuals. 
<br/><br/><label>ISBN: </label>0852381107 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sonar in fishing.<br/>Echo sounding in fishing.
<br/><br/><label>Dewey Class. No.: </label>639.2028 ECH