Somaratna, Parana Vidanage ප්රාග් ඒෙතිහාසික යුගය (ප්රථම භාගය) = Prag aethihasika ugaya Prathama Bhagaya - Nugegoda Deepani 1980 - 57 p. Subjects--Topical Terms: Pre historical periodCulturePaleontology Dewey Class. No.: 930 / S55