Samarasinghe, S. I. <br/><br/>
Organic chemistry. pt.I   aromatic heterocyclic chemistry 
<label>/ by </label> Samarasinghe, S. I. 
<label>;</label> Gunaherath, G. M. <label>;</label> Chandana, A. K.  
 - Nawala  Open Uniiversity of Sri Lanlka  1989 
 - [vii], 61p.  ill.  27 cm. 
<br/><br/><label>Dewey Class. No.: </label>547.6  / SAM