Making aquatic weeds useful:  Some perspective for developing countries 
National Academy of Sciences 
 - Washington D.C.:  National Academy of Sciences,  1976 
 - viii, 175p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Subjects--Index Terms: </label>Grass carp Crayfish 
<br/><br/><label>Universal Decimal Class. No.: </label>632.51.004.1(204)  / L6