Chandrasena, J.P.N.R. <br/><br/>
An Illustrated Manual of Rice-Field Weeds in Sri Lanka<br/>(Unesco: Man and the Biosphere National Commitee for Sri Lanka: Publication No. 19) 

 - Sri Lanka,  The Natural Resources, Energy & Science Authority,  1979, 
 - 185p.  28cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>An Illustrated Manual of Rice-Field Weeds<br/>Man and the Biosphere National Committee