Johannesson, K. A. <br/><br/>
Fisheries acoustics :  a practical manual for aquatic biomass estimation / 
by K.A. Johannesson, R.B. Mitson. 
 - Rome :  Food and Agriculture Organization of the United Nations,  c1983. 
 - FAO fisheries technical paper ;  no. 240 .
<br/><br/> "FIRM/T240." 
<br/><br/>Bibliography: p. 244-249. 
<br/><br/><label>ISBN: </label>9251014493 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fisheries -- Equipment and supplies.--Fisheries -- Equipment and supplies.<br/>Fish detection.<br/>Echo sounding in fishing.