Sri Lanka Scientific & Technical Information Centre <br/><br/>
Union catalogue of scientific & technical books, vols 11 & 12, 1987 & 1988. 

 - Colombo  Sri Lanka Scientific & Technical Information Centre, Natural  0 
 - 366 p. 
<br/><br/><label>ISBN: </label>249597 
<br/><br/><label>Dewey Class. No.: </label>16.5  / SRI