OPEN University of Sri Lanka <br/><br/>
Foundation course level one: botany PSF 1305 botany 1, block 1 

 - Nugegoda  Open University of Sri Lanka  1988 
 - 139 p. 
<br/><br/><label>ISBN: </label>139122 
<br/><br/><label>Dewey Class. No.: </label>581  / OPE