Rupesinghe, H.F. <br/><br/>
The Machine Postmarks of Sri Lanka/  English. 
Rupesinghe, H.F. 
 - Nugegoda:  Author,  2018. 
 - x,164p.:  ill., Photographs,;  25cm. 
<br/><br/><label>ISBN: </label>9789553899705 
<br/><br/><label>Dewey Class. No.: </label>769.56  / RUP