The customs guide (Ceylon) : Vol 2 

 - 1 
 - Colombo  T.Siva Lingam  1954 
 - 112 
<br/><br/><label>Subjects--Topical Terms: </label><br/>export duties<br/>import duties<br/>Sri Lanka
<br/><br/><label>Dewey Class. No.: </label>351.82  / SIV