Ponnamperuma ,Nihal පණ්ඩුකාභය මහ රජතුමා - Sdhini Prakashan Mathara 2004 - 36p 1 - 2023-08-09 ISBN: 955-841887-0 Nat. Bib. No.: 0002124 Nat. Bib. Agency Control No.: PON Universal Decimal Class. No.: 920