Van Helvoort, Gus <br/><br/>
Ovserver program operations Manual / 
by Gus Van Helvoort 
 - Rome :  FAO,  1986 
 - xi, 207 p. :  ill.;  30 cm. 
 - FAO fisheries technical paper ;  275 .
<br/><br/>Bibliography: p. 120-121 
<br/><br/><label>ISBN: </label>9251024618 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Acquaculture<br/>Fisheries<br/>Fishes--Cultural control<br/>Fishing--Catch effort<br/>Fishery management
<br/><br/><label>Dewey Class. No.: </label>639.2