Directory of government publication 

 - Colombo  National Library of Sri Lanka  1990 
 - 150p. 
<br/><br/><label>ISBN: </label>9559011715 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BIBLIOGRAPHIES OF WORKS ON SPECIFIC SUBJECTS
<br/><br/><label>Dewey Class. No.: </label>016.5493  / DIR